Fix platform startup on Starlette 1.0 and register github service

- Convert the shutdown hook to a lifespan context manager so uvicorn
  boots on Starlette 1.0 (the decorator-based ``on_event`` hook was
  removed in that release and crashed ``create_app`` at import time).
- Add ``github`` to the ``Service`` enum so ``initEnv`` accepts the
  GitHub templates that were landed alongside the service package.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 2 people

backend/src/platform/api/main.py

@@ -1,3 +1,5 @@
+from contextlib import asynccontextmanager
+
 from sqlalchemy import create_engine
 from sqlalchemy.pool import NullPool
 from src.platform.isolationEngine.session import SessionManager
@@ -35,7 +37,13 @@
 
 
 def create_app():
-    app = Starlette()
+    @asynccontextmanager
+    async def lifespan(app_):
+        yield
+        if getattr(app_.state, "replication_service", None):
+            app_.state.replication_service.stop()
+
+    app = Starlette(lifespan=lifespan)
     db_url = environ["DATABASE_URL"]
 
     # Use NullPool when using Neon's PgBouncer (-pooler) to avoid double pooling
@@ -143,12 +151,6 @@ def create_app():
 
     app.mount("/api/env/{env_id}/services/linear", linear_graphql)
 
-    @app.on_event("shutdown")
-    async def shutdown_event():
-        # Stop replication service if running (it's on-demand now)
-        if app.state.replication_service:
-            app.state.replication_service.stop()
-
     return app
 
 

backend/src/platform/api/models.py

@@ -13,6 +13,7 @@ class Service(str, Enum):
     linear = "linear"
     calendar = "calendar"
     box = "box"
+    github = "github"
 
 
 class Visibility(str, Enum):