Add /mcp mount for Claude compatibility

- Mount MCP app on both /mcp/ and /mcp paths
- Claude is calling /mcp instead of /mcp/
- This should fix the 405 Method Not Allowed errors

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

asgi_app.py

@@ -82,6 +82,7 @@ async def custom_401_handler(request: Request, exc: HTTPException):
 
 # Mount MCP app as sub-application  
 app.mount("/mcp/", mcp_app)
+app.mount("/mcp", mcp_app)  # Also mount without trailing slash for Claude compatibility
 
 # FastAPI health check endpoint
 @app.get("/health")