fix: use sse_app() instead of http_app() for SSE endpoints

- FastMCP http_app() only provides /mcp endpoint (not SSE)
- FastMCP sse_app() provides /sse/ endpoint (what we need)
- Using deprecated sse_app() but suppressing warning since it's required for SSE
- SSE endpoint now accessible: http://localhost:8000/sse/ returns 200 OK
- CORS headers still working: access-control-allow-origin: *
- Browser SSE client can now connect successfully

Author: T-rav

weather_mcp/cli.py

@@ -90,10 +90,14 @@ async def run_server():
 
         setup_weather_tools(mcp_server, weather_client)
 
-        # Mount the MCP server to the FastAPI app
-        mcp_app = mcp_server.http_app()
+        # Mount the MCP SSE app to the FastAPI app (deprecated but needed for SSE)
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            mcp_app = mcp_server.sse_app()
         app.mount("/", mcp_app)
-        logger.info("Mounted FastMCP server to FastAPI app")
+        logger.info("Mounted FastMCP SSE server to FastAPI app")
 
         return app