Fix agent config handler registration, remove debug prints, disable RabbitMQ heartbeats (#764)

- Fix agent react and orchestrator services appending bare methods
  to config_handlers instead of using register_config_handler() —
  caused 'method object is not subscriptable' on config notify
- Add exc_info to config fetch retry logging for proper tracebacks
- Remove debug print statements from collection management
  dispatcher and translator
- Disable RabbitMQ heartbeats (heartbeat=0) to prevent broker
  closing idle producer connections that can't process heartbeat
  frames from BlockingConnection

trustgraph-base/trustgraph/base/async_processor.py

@@ -172,7 +172,8 @@ class AsyncProcessor:
 
             except Exception as e:
                 logger.warning(
-                    f"Config fetch failed: {e}, retrying in 2s..."
+                    f"Config fetch failed: {e}, retrying in 2s...",
+                    exc_info=True
                 )
                 await asyncio.sleep(2)
 

trustgraph-base/trustgraph/base/rabbitmq_backend.py

@@ -288,6 +288,7 @@ class RabbitMQBackend:
             port=port,
             virtual_host=vhost,
             credentials=pika.PlainCredentials(username, password),
+            heartbeat=0,
         )
         logger.info(f"RabbitMQ backend: {host}:{port} vhost={vhost}")
 

trustgraph-base/trustgraph/messaging/translators/collection.py

@@ -79,7 +79,6 @@ class CollectionManagementResponseTranslator(MessageTranslator):
     def encode(self, obj: CollectionManagementResponse) -> Dict[str, Any]:
         result = {}
 
-        print("COLLECTIONMGMT", obj, flush=True)
 
         if obj.error is not None:
             result["error"] = {
@@ -99,6 +98,4 @@ class CollectionManagementResponseTranslator(MessageTranslator):
                     "tags": list(coll.tags) if coll.tags else []
                 })
 
-        print("RESULT IS", result, flush=True)
-
         return result