fix(arch-a2): deactivation cleanup - container services, search provider, hook deregistration, notification sync, task state, activation order

app/plugins/builtins/ai_ui_control/plugin.py

@@ -62,7 +62,10 @@ class AIUIControlPlugin(BasePlugin):
         from app.plugins.builtins.contracts import get_contract_registry
         get_contract_registry().unregister(self.manifest.name)
 
-        await super().on_deactivate(db, service_container, event_bus)
+        # Remove the WebSocket manager BEFORE super() so that event handlers
+        # being unsubscribed can no longer reach it (ARCH-044).
         if service_container.has("ai_ui_control_ws"):
             service_container.remove("ai_ui_control_ws")
             logger.info("AI UI Control WebSocket manager removed")
+
+        await super().on_deactivate(db, service_container, event_bus)