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-flow/trustgraph/agent/orchestrator/service.py

@@ -93,7 +93,9 @@ class Processor(AgentService):
         # Meta-router (initialised on first config load)
         self.meta_router = None
 
-        self.config_handlers.append(self.on_tools_config)
+        self.register_config_handler(
+            self.on_tools_config, types=["tool", "tool-service"]
+        )
 
         self.register_specification(
             TextCompletionClientSpec(

trustgraph-flow/trustgraph/agent/react/service.py

@@ -81,7 +81,9 @@ class Processor(AgentService):
         # Track active tool service clients for cleanup
         self.tool_service_clients = {}
 
-        self.config_handlers.append(self.on_tools_config)
+        self.register_config_handler(
+            self.on_tools_config, types=["tool", "tool-service"]
+        )
 
         self.register_specification(
             TextCompletionClientSpec(

trustgraph-flow/trustgraph/gateway/dispatch/collection_management.py

@@ -28,9 +28,7 @@ class CollectionManagementRequestor(ServiceRequestor):
         self.response_translator = TranslatorRegistry.get_response_translator("collection-management")
 
     def to_request(self, body):
-        print("REQUEST", body, flush=True)
         return self.request_translator.decode(body)
 
     def from_response(self, message):
-        print("RESPONSE", message, flush=True)
         return self.response_translator.encode_with_completion(message)