revert: cloudflared tunnel localhost fix — wrong diagnosis

The API container and tool instances share the 'backend' Docker network
(connect_container_to_network at tool_instances.py:1576). cloudflared
runs INSIDE the api container, so localhost:host_port is unreachable.

The original container_name:internal_port is correct for networking.
The 'app error 0' is an application-level issue, not networking.

This reverts commit a8fbca9.

apps/api/src/services/lifecycle_hooks.py

@@ -120,9 +120,9 @@ async def publish_lifecycle_event(
     # Create notification for instance owner (fire-and-forget)
     # Skip intermediate "starting" notifications — only notify on terminal states
     # (failed or successful attempts)
-    _is_starting_intermediate = (
-        event_type == "instance.started" and (status or instance.status) == "starting"
-    )
+    _is_starting_intermediate = event_type == "instance.started" and (
+        status or instance.status
+    ) == "starting"
     if _is_starting_intermediate:
         return