[ITEP-81197] Publish to scene topics when there are no detections (#591)

Co-authored-by: Sarat Poluri <sarat.chandra.poluri@intel.com>
Co-authored-by: dpitulax <99968922+dpitulax@users.noreply.github.com>

Author: 3 people

controller/src/controller/scene_controller.py

@@ -404,6 +404,14 @@ def handleMovingObjectMessage(self, client, userdata, message):
           log.error("UNKNOWN SENDER", sender_id)
           return
         scene = sender
+
+        # If no detection types in the message, add empty arrays for all tracked types
+        # This must be done BEFORE processCameraData so the tracker processes them
+        if not detection_types:
+          detection_types = list(scene.tracker.trackers.keys())
+          for dtype in detection_types:
+            jdata['objects'][dtype] = []
+
         success = scene.processCameraData(jdata, when=msg_when)
 
       if not success: