- send F1 Setup using callback
- store f1 setup req locally for reference
- check F1 Setup Req against RRC data structures:
  * if matches: send F1 Setup Response using callback
  * if not matching: send F1 Setup Failure using callback
- don't send CU config update by default, we don't need this
- if the Setup Response does not contain a cell, don't activate. It is
  possible the CU sends a gNB-CU configuration update, which will
  initialize the structures