fix: use _mcp_server instead of server to resolve AttributeError

fix: complete raw ASGI router implementation for SSE

fix: use raw ASGI handler for SSE to avoid Request object attribute errors

fix: typo in sse.handle_post_message handler name

fix: manual Starlette/SSE launch to force 0.0.0.0:PORT binding

fix: bypass FastMCP.run and use explicit uvicorn binding for SSE

fix: resolve TypeError in FastMCP.run and upgrade to Python 3.11

docs: add Hugging Face Space metadata