fix(hermes): add StreamHandler, finally/loop.close, event logging per Abiba review

hermes-zulip-plugin/src/hermes_zulip/adapter.py

@@ -4,12 +4,23 @@
 
 import asyncio
 import logging
+import sys
 import time
 import re
 import threading
 from typing import Any, Dict, Optional
 
 logger = logging.getLogger(__name__)
+# Ensure logger output reaches journald (systemd captures stderr)
+if not logger.handlers:
+    _handler = logging.StreamHandler(sys.stderr)
+    _handler.setLevel(logging.INFO)
+    _handler.setFormatter(logging.Formatter(
+        '%(asctime)s [%(levelname)s] %(name)s: %(message)s',
+        datefmt='%Y-%m-%d %H:%M:%S'
+    ))
+    logger.addHandler(_handler)
+    logger.setLevel(logging.INFO)
 
 class ZulipAdapter:
     """Zulip adapter for Hermes agents. Connects to Zulip, listens for
@@ -112,10 +123,11 @@ class ZulipAdapter:
         }
 
     def _event_loop(self) -> None:
-        # Create an event loop for this background thread (Python 3.13+)
+        """Background thread to listen for Zulip events.
+        Creates a dedicated asyncio event loop for this thead (Python 3.13+).
+        """
         loop = asyncio.new_event_loop()
         asyncio.set_event_loop(loop)
-        """Background thread to listen for Zulip events."""
         try:
             self._client.call_on_each_message(
                 lambda event: self._process_event(event),
@@ -123,10 +135,14 @@ class ZulipAdapter:
         except Exception as e:
             logger.error(f"Event loop crashed: {e}")
             self.connected = False
+        finally:
+            loop.close()
+            logger.info("Event loop closed.")
 
     def _process_event(self, event: Dict[str, Any]) -> None:
         """Bridge the synchronous event to the async on_event handler."""
-        import asyncio
+        event_type = str(event.get("type", "unknown"))
+        logger.info(f"[ZULIP_EVENT] Processing: {event_type}")
         try:
             loop = asyncio.get_event_loop()
             if loop.is_running():
@@ -134,4 +150,4 @@ class ZulipAdapter:
             else:
                 asyncio.run(self.on_event(event))
         except Exception as e:
-            logger.error(f"Error processing event: {e}")
+            logger.error(f"Error processing event: {e}")