Tests: enable SIB2/SIB3/SIB4 example config in F1 rfsim CI

Update the shared neighbour config used by the F1 rfsim pipeline to
enable CU-provided SIB2 and neighbour-derived SIB3/SIB4 inputs.

In `ci-scripts/conf_files/gnb-cu.sa.band78.106prb.conf`
- Add `cu_sibs = (2, 3, 4)

In `ci-scripts/conf_files/neighbour-config.conf`:
- Add a complete `sib2_config` block
- Add `frequency_list` / `frequency_config` for inter-frequency SIB4 fields
- Extend both neighbour entries with per-cell offsets

ci-scripts/conf_files/gnb-cu.sa.band78.106prb.conf

@@ -17,6 +17,7 @@ gNBs =
     // Tracking area code, 0x0000 and 0xfffe are reserved values
     tracking_area_code  =  1;
     plmn_list = ({ mcc = 208; mnc = 99; mnc_length = 2; snssaiList = ({ sst = 1, sd = 0xffffff }) });
+    cu_sibs = ( 2, 3, 4 );
     @include "neighbour-config.conf"
 
     nr_cellid = 12345678L;

ci-scripts/conf_files/neighbour-config.conf

@@ -5,6 +5,57 @@
 #  for the 2-cell rfsim setup (gNB_ID 0xe00 & 0xb00)       #
 ############################################################
 
+############################################################
+#                           SIB2                           #
+############################################################
+
+sib2_config : {
+  q_Hyst                   = 0;
+  cellReselectionPriority  = 0;
+  threshServingLowP        = 0;
+  threshServingLowQ        = 0;
+  s_NonIntraSearchP        = -1;
+  s_NonIntraSearchQ        = -1;
+  q_RxLevMin               = -56;
+  q_QualMin                = -1;
+  s_IntraSearchP           = 22;
+  s_IntraSearchQ           = -1;
+  t_ReselectionNR          = 1;
+  deriveSSB_IndexFromCell  = 1;
+
+  speed_t_Evaluation       = 0;
+  speed_t_HystNormal       = 0;
+  speed_n_CellChangeMedium = 1;
+  speed_n_CellChangeHigh   = 2;
+  speed_sf_Medium          = 1;
+  speed_sf_High            = 0;
+};
+
+############################################################
+#      Per-frequency SIB4 inter-frequency configuration    #
+############################################################
+
+frequency_list = (
+  {
+    absoluteFrequencySSB = 621312;
+    subcarrierSpacing    = 1; # 30 kHz
+    band                 = 78;
+
+    frequency_config = (
+      {
+        cellReselectionPriority = 5;
+        threshX_HighP           = 10;
+        threshX_LowP            = 6;
+        threshX_HighQ           = -1;
+        threshX_LowQ            = -1;
+        q_OffsetFreq            = 0;
+        q_RxLevMin              = -56;
+        t_ReselectionNR         = 1;
+      }
+    );
+  }
+);
+
 neighbour_list = (
   ##########################################################
   #      Entry USED BY gNB_ID = 0xe00  (nr_cellid = 1)     #
@@ -21,6 +72,9 @@ neighbour_list = (
         band                = 78;
         plmn                = { mcc = 208; mnc = 99; mnc_length = 2 };
         tracking_area_code  = 1;
+        q_OffsetCell        = 2;
+        q_RxLevMinOffsetCell= 2;
+        q_QualMinOffsetCell = 1;
       }
     );
   },
@@ -40,6 +94,9 @@ neighbour_list = (
         band                = 78;
         plmn                = { mcc = 208; mnc = 99; mnc_length = 2 };
         tracking_area_code  = 1;
+        q_OffsetCell        = 2;
+        q_RxLevMinOffsetCell= 2;
+        q_QualMinOffsetCell = 1;
       }
     );
   }