fix: mcp cancel scope cross task spin

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: GlowingBrick

astrbot/core/provider/func_tool_manager.py

@@ -724,7 +724,7 @@ async def connect_and_lifecycle() -> None:
                 raise
             finally:
                 # Cleanup in the same task that entered the anyio contexts
-                await self._terminate_mcp_client(name)
+                await asyncio.shield(self._terminate_mcp_client(name))
 
         lifecycle_task = asyncio.create_task(
             connect_and_lifecycle(), name=f"mcp-client:{name}"