fix: correct uvicorn app path in agent-coordinator wrapper

The wrapper was using src.app.main:app which expects 'src' to be a top-level
module, but with PYTHONPATH set to apps/agent-coordinator/src, the correct
import target is app.main:app.

scripts/wrappers/aitbc-agent-coordinator-wrapper.py

@@ -30,7 +30,7 @@ exec_cmd = [
     "/opt/aitbc/venv/bin/python",
     "-m",
     "uvicorn",
-    "src.app.main:app",
+    "app.main:app",
     "--host",
     "0.0.0.0",
     "--port",