add a monitoring camera setting for cetana

apps/live_monitoring/serializers.py

@@ -4,7 +4,15 @@ from apps.live_monitoring.models import Camera
 
 
 class CameraSerializer(serializers.ModelSerializer):
-    # auth_config is never exposed to the frontend.
+    """Public camera card. Stream URLs and credentials are never listed here —
+    clients must go through the tokenized ``access`` / ``verify`` flow.
+    """
+
+    protocol = serializers.SerializerMethodField()
+
     class Meta:
         model = Camera
-        fields = ["id", "name", "facility", "processing_line", "stream_url", "active"]
+        fields = ["id", "name", "facility", "processing_line", "protocol", "active"]
+
+    def get_protocol(self, obj: Camera) -> str:
+        return obj.resolved_protocol()