second pass adding beacons admin (#10839)

* second pass adding beacons admin

* Bump protobufs submodule to merged MESHBEACON_CONFIG (PR #970)

clod helped.

* Gate MeshBeacon module config behind admin auth in PhoneAPI

The FromRadio module-config sync copied moduleConfig.mesh_beacon unconditionally. MeshBeaconConfig embeds two ChannelSettings (broadcast_offer_channel, broadcast_on_channel) that carry PSKs, so an unauthorized client could exfiltrate channel PSKs when MESHTASTIC_PHONEAPI_ACCESS_CONTROL is enabled - bypassing the redaction already applied to mqtt/network/security config.
Gate the payload copy on getAdminAuthorized(), mirroring the mqtt case; unauth clients now receive an empty MeshBeaconConfig.

clod helped

src/modules/AdminModule.cpp

@@ -1487,6 +1487,13 @@ void AdminModule::handleGetModuleConfig(const meshtastic_MeshPacket &req, const
             res.get_module_config_response.which_payload_variant = meshtastic_ModuleConfig_traffic_management_tag;
             res.get_module_config_response.payload_variant.traffic_management = moduleConfig.traffic_management;
             break;
+#if !MESHTASTIC_EXCLUDE_BEACON
+        case meshtastic_AdminMessage_ModuleConfigType_MESHBEACON_CONFIG:
+            configName = "MeshBeacon";
+            res.get_module_config_response.which_payload_variant = meshtastic_ModuleConfig_mesh_beacon_tag;
+            res.get_module_config_response.payload_variant.mesh_beacon = moduleConfig.mesh_beacon;
+            break;
+#endif
         }
         LOG_INFO("Get module config: %s", configName);