Merge remote-tracking branch 'origin/zmq-radio-3' into integration_2026_w17 (!3975)

ZMQ radio

This is a zmq radio implementation that attempts to integrate NR UE with
the ocudu project.

OAI integration status:
This can currently be used to connect OAI gnb and OAI UE.

Compilation:
cmake --build . --target nr-softmodem nr-uesoftmodem ldpc params_libconfig zmq_radio

Running
- gNB command:
sudo ./nr-softmodem -O ../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf --gNBs.[0].min_rxtxtime 6 --device.name zmq_radio --zmq.[0].tx_channels tcp://127.0.0.1:4556 --zmq.[0].rx_channels tcp://127.0.0.1:4557

- UE command:
sudo ./nr-uesoftmodem -r 106 --numerology 1 --band 78 -C 3619200000 --ssb 516 --device.name zmq_radio --zmq.[0].tx_channels tcp://127.0.0.1:4557 --zmq.[0].rx_channels tcp://127.0.0.1:4556

A new CI testcase for 2x2 configuration was added.

OCUDU integration status:
The OAI NR UE enters RRC Connected state.

For more details, please refer to the description of MR !3975.

cmake_targets/build_oai

@@ -68,7 +68,7 @@ Options:
 --UE-conf-nvram [configuration file]
    Specify conf_nvram_path (default \"$conf_nvram_path\")
 -w | --hardware
-   USRP, BLADERF, LMSSDR, IRIS, SIMU, AW2SORI, AERIAL, None (Default)
+   USRP, BLADERF, LMSSDR, IRIS, SIMU, AW2SORI, AERIAL, ZMQ, None (Default)
    Adds this RF board support (in external packages installation and in compilation)
 -t | --transport
    Selects the transport protocol type, options: None, Ethernet, oran_fhlib_5g, oran_fhlib_5g_mplane, WLS
@@ -223,7 +223,7 @@ function main() {
             shift 2;;
        -w | --hardware)
             case "$2" in
-                "USRP" | "BLADERF" | "LMSSDR" | "IRIS")
+                "USRP" | "BLADERF" | "LMSSDR" | "IRIS" | "ZMQ")
                     HWs+=" OAI_"$2
                     TARGET_LIST="$TARGET_LIST oai_${2,,}devif" # ,, makes lowercase
                     CMAKE_CMD="$CMAKE_CMD -DOAI_$2=ON"