refactor agent runner orchestration boundaries

src/langbot/pkg/provider/modelmgr/modelmgr.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import asyncio
 import sqlalchemy
 import traceback
 
@@ -84,8 +85,19 @@ class ModelManager:
             self.ap.logger.info('LangBot Space Models service is disabled, skipping sync.')
             return
 
+        sync_timeout = space_config.get('models_sync_timeout')
         try:
-            await self.sync_new_models_from_space()
+            if sync_timeout:
+                await asyncio.wait_for(
+                    self.sync_new_models_from_space(),
+                    timeout=float(sync_timeout),
+                )
+            else:
+                await self.sync_new_models_from_space()
+        except asyncio.TimeoutError:
+            self.ap.logger.warning(
+                f'LangBot Space model sync timed out after {sync_timeout}s, skipping startup sync.'
+            )
         except Exception as e:
             self.ap.logger.warning('Failed to sync new models from LangBot Space, model list may not be updated.')
             self.ap.logger.warning(f'  - Error: {e}')