Refactor imscope

This MR refactors imscope by introducing changes to the default layout
in the config file imgui.ini. The global settings are moved to a new
menu item. This modified layout is intended as a suggestion subject to
change based on feedback. This MR also adds PDCCH LLR and IQ plots to
the UE scope and set axes to AutoFit by default.

The MR has a screenshot of the new layout.

Remove schedule response and update L1 threading documentation

This merge requests removes the somewhat superfluous "schedule response"
mechanism. "schedule response" was run after running the scheduler
itself and copied various FAPI messages into a global msgDataTx
structure from which the various TX/RX jobs were triggered. It is not
necessary, though, given that the scheduler is run inside the tx_func()
(running the TX jobs of the L1), and so the scheduler output FAPI
messages can directly be read into a variable of the existing
NR_Sched_Rsp_t type. This allows to delete a couple of hundred lines of
code (while retaining functionality), and simplifies the msgDataTx type
(which is still there to trigger TX job (including the scheduler) from
the ru thread).

In short, prior, there was this call chain:

- tx_func() calls run_scheduler_monolithic() (through fptr
  NR_slot_indication())
  - get some memory through allocate_sched_response() which has enough
    space for NR_Sched_Rsp_t type variable
  - call the scheduler and fill the variable
  - call nr_schedule_response() (through fptr NR_schedule_response())
    which copies into L1: to msgDataTx for TX, to separate structures
    for RX

this is changed to

- tx_func() runs one message at a time, hence we can use memory in the
  data segment for NR_Sched_Rsp_t. It calls run_scheduler_monolithic()
  through the fptr
  - pointers into NR_Sched_Rsp_t are passed to the scheduler, which
    fills as before
  - we return, memory is in its right place and does not need an extra
    copy.

Additionally, this merge request updates documentation on threading and
cleans up some unused code along the way.

Update log header format to align log output

The new format:
- left-aligns the log header name and enforces a minimum width of 6 characters,
  padding shorter names with spaces while allowing longer names to be printed in
  full
- shortens UTC timestamp
- align function names to 32 characters

Example output:

[19:51:34.647930] [NGAP]   I (ngap_gNB_decode_initiat:100)   Handover Resource Allocation initiating message
[19:51:34.648539] [NGAP]   D (decode_ng_handover_requ:267)   AllowedNSSAI.list.count 2
[19:51:34.648586] [NGAP]   I (ngap_gNB_handle_handove:728)   Received NG Handover Request from AMF OAI-AMF (ID=1)
[19:51:34.648627] [NR_RRC] I (rrc_gNB_process_Handove:1199)  Received Handover Request (on NR Cell ID=11111111, PCI=1)
[19:51:34.648647] [NR_RRC] A (rrc_gNB_create_ue_conte:230)   [--] (cellID 0, UE ID 1 RNTI ffff) Create UE context: CU UE ID 1 DU UE ID 4294967295 (rnti: ffff, random ue id ffffffffffffffff)
[19:51:34.648659] [NR_RRC] A (set_UE_security_algos:692)     [--] (cellID 0, UE ID 1 RNTI ffff) Selected security algorithms: ciphering 0, integrity 2

Handling newly opened UE issues

Closes #1025 #1024 #1026 #1031 #1030

Reimplement nFAPI message exchange between L1 and L2 following the
changes in parent commit removing msgDataTx.

Avoid direct calls and use NR_IF_module fptrs to avoid linking problems.
allowing to remove some function definitions that are not needed.

Note: after this commit, monolithic works but nFAPI operation is broken
and fixed in the next commit, to keep the changes small(er). All
simulators work.

This commit removes the use of msgDataTx's intermediate buffers for FAPI
messages and the call of the "Schedule response". The latter incurs an
additional copy of FAPI messages for the TX chain (for the RX chain, it
is and will remain there) which we can avoid.

Instead, it uses an NR_Sched_Rsp_t-typed variable sched_response to
store the results of the scheduler when called from tx_func(). Thus, the
scheduler remains unchanged (it gets a pointer to where to put FAPI
messages), but we don't call nr_schedule_response() to then copy FAPI
messages into the L1, but have them in a local variable sched_response.
sched_response on on the data segment, as it is big and would overflow
the stack; at the same time, this is ok because only one tx_func() runs
at a time.

Since we don't use allocate_sched_response() anymore, we don't need
deref_sched_response().

clear_slot_beamid() is moved to tx_func(), as it was called in
nr_schedule_response().

Since the "intermediate" NR_gNB_DLSCH_t structure groups both the
DL_tti_pdsch and TX_data.req structures, a pointer has been created to
point to pdsch_pdu. This affects a number of simulators, as they have to
put some messages on the stack:

- nr_dlschsim: put the corresponding variable on the stack
- nr_pbchsim: a new array for the SSB PDUs has been introduced

Further, these changes are now necessary:

- nr_dlsim:  there were variables "rel15" and "pdsch_pdu_rel15" that
  point to the same PDSCH PDU. At least "rel15" would not exist, as the
  corresponding pointer is now populated in phy_procedures_gNB_TX(), and
  we therefore refer to the single PDSCH PDU variable with
  "pdsch_pdu_rel15", but at the place where "rel15" used to be
  initialized.
- nr_ulsim: use nr_save_ul_tti_req() to load PDUs into the RX chain
  instead of nr_schedule_response(), which does not exist anymore.

The next commit will remove msgDataTx. We can therefore not use
msgDataTx to retain the PDSCH/DLSCH variables, and move them to the gNB.

Note that the only reason for NR_gNB_DLSCH_t after this commit is to
hold various large buffers (c, b, f). Future work could be done to
remove this, in which case the array inside PHY_VARS_gNB could be
deleted.

On this occasion, clean up the use of init_DLSCH_struct() and
reset_DLSCH_struct() (renamed destroy_DLSCH_struct()) and centralize
their call in phy_init_nr_gNB()/phy_free_nr_gNB(), and correct
simulators accordingly.

Merge remote-tracking branch 'origin/improve-readability-phy_procedures_gNB_uespec_RX' into integration_2025_w46 (!3707)

Cleanup phy_procedures_gNB_uespec_RX

phy_procedures_gNB_uespec_RX is too long function with too long lines of code,
this commit only shorten lines and improve a bit the readability

[MAC] Add UL total/used aggregated MAC stats; [E2 agent] Properly calculate
used UE PRBs in KPM; [CI] Simplify and improve the Undeploy_Object() and
implement Stop_Object()

- Create common dlul_mac_stats_t struct for both DL and UL total/used aggregated
  PRBs
- Use correct unit [%] for RRU.PrbTotDl and RRU.PrbTotUl , instead of [PRBs]
- Use correct unit [Mb] for DRB.PdcpSduVolumeDL and DRB.PdcpSduVolumeUL [kb]
- Implement Stop_Object() (docker compose stop = SIGTERM)
- Simplify the Undeploy_Object() function
- Improve the logging for Deploy/Undeploy_Object() functions
- OAI-FlexRIC CI: properly stop all the containers (one by one or a subgroup of
  running containers), and rename oai-flexric to nearRT-RIC container

CI: Increase tested UL throughput on Aerial pipeline using 2L UL

The goal of this MR is to activate the use of 2-layer uplink by enabling SRS
and to increase the tested UL throughput in CI.

The new format left-aligns the component name and enforces a minimum width
of 7 (log component) characters, padding shorter names with spaces after
the closing "]".

Example output:

    [14:05:43.395376] [E1AP]   I releasing UE 1
    [14:05:43.395400] [GTPU]   I [91] UE ID 1: Delete all tunnels (1 tunnels)
    [14:05:43.395414] [NR_RRC] A [DL] (cellID bc614e, UE ID 1 RNTI 8e27) Send RRC Release
    [14:05:43.395431] [RRC]    I UE 1: received bearer release complete
    [14:05:43.424551] [RLC]    W Remove UE 36391
    [14:05:43.424597] [NR_RRC] I removed UE CU UE ID 1/RNTI 8e27
    [14:05:43.424773] [NR_RRC] A [--] (cellID bc614e, UE ID 1 RNTI 8e27) Remove UE context
    [14:05:43.425205] [NR_MAC] I Remove NR rnti 0x8e27
    [14:05:43.582158] [HW]     W Lost socket
    ^C
    ** Caught SIGTERM, shutting down
    Returned from ITTI signal handler
    [14:05:43.948721] [GNB_APP] I stopping nr-softmodem
    [14:05:43.948746] [PHY]    I Killing gNB 0 processing threads
    [14:05:44.574818] [PHY]    I Stopping RU 0 processing threads
    [14:05:44.575000] [PHY]    I RU 0 RF device stopped
    [14:05:44.575006] [GNB_APP] I turned off RU rfdevice

Prior to this change, when no "level" option is given to the logging
module, we see

    [PHY]   RU 0 RF started cpu_meas_enabled 0
    [HW]   No connected device, generating void samples...

with three spaces, which is too much. This change reduces the amount of
spaces to 1 without log level.
Co-authored-by: Robert Schmidt <robert.schmidt@openairinterface.org>

We probably almost never care about the date, but it takes a lot of
space. Remove it; if somebody needs the full time stamp including the
date, we could still add it with a new option.

1. Rename oai-flexric to nearRT-RIC. FlexRIC is a project combining nearRT-RIC, xApps, and E2 agent emulators.
2. Instead of undeploying all the containers at the same time, and not checking the logs for xApps and nearRT-RIC, do the following:
- Stop containers (docker compose stop) - one or subgroup of running containers in the following order:
   a) xapp-kpm-moni
   b) xapp-kpm-rc
   c) xapp-gtp-mac-rlc-pdcp-moni
   d) oai-nr-ue oai-nr-ue2
   e) oai-gnb
   f) nearRT-RIC
- Undeploy containers (docker compose down), collect and analyze all the logs.

For some test cases, we might want to stop a service earlier. This
functionality is done by StopObject().

Test log collection is still done by UndeployObject(), which will
collect the logs of all services (at that point, stopped or not).

In all these cases, the intention is to undeploy all services.
Correspondingly, remove the services from the XML to avoid any
ambiguity.

Consistently print requested services (if applicable)
and outcome of the step.

GetRunningServices() was returning all services, running or stopped.
Hence, rename to reflect what this function does, and rewrite slightly
to better capture what is actually happening. Also, don't return the
container ID, as we don't use it.

Call stop on all services, as we will down the deployment right after.
The list of services is still used to retrieve logs.

Remove a stray "return False", which would sometimes prevent us from
seeing all error messages.

Collection of small fixes

A few fixes needed while testing FHI libraries
- set subcarrier spacing in PUSCH PDU in NRUE
- a set of two LOG_Ds that prints out the PUSCH allocation on gNB & UE

[NGAP] Fix incorrect AMF Set ID type (uint8 → uint16) causing AMF lookup failure

This PR fixes issue #1012 , a data type issue related to the AMF Set ID used
during UE RRC reestablishment. The AMF Set ID was mistakenly declared as uint8_t
instead of uint16_t, even though it is a 10-bit field as specified in 3GPP TS
23.003 section 2.10.1. As a result, AMF Set IDs greater than 255 were truncated,
leading to failed AMF lookups and the following warning: No matching AMF found
for PLMN (MCC=%03d MNC=%0*d) and AMF SetID=%u.
Verified reestablishment succeeds with AMF Set IDs >255.

A later commit will remove "msgTx" altogether. Push it out from L1
functions.

DLSCH encoding is not concerned with HARQ processes directly. Instead,
it gets the redundancy version and encodes a specific redundancy version
for a given TB. The rest is up to the MAC, the L1 is stateless in that
regard. Hence, remove the HARQ type and put it into DLSCH, which also
simplifies the code elsewhere.

unav_res is already computed in nr_generate_pdsch(), and then used
inside of nr_dlsch_encoding() right after.

Similarly to the parent commit, simplify the array type to the FAPI PDU
towards further refactoring, and encapsulate the code in a function for
easier reuse in a later refactoring step.

Note on ZP-CSI: after this commit, we continue treating CSI PDUs. The
prior code was returning, which I think is wrong (as this information is
only for the currently treated CSI-RS PDU).

There is no point in tracking the "active" state: the SSB PDU will be
sent from MAC to L1, encoded, and then "discarded" (by marking the
number of SSB PDUs as 0). Hence, remove this intermediate type.