force os._exit(0) after successful run to prevent event loop spin

Author: anticomputer

src/seclab_taskflow_agent/cli.py

@@ -160,6 +160,10 @@ def main(
             ),
             debug=debug,
         )
+        # Force-exit on success to prevent asyncio event loop spin on
+        # dangling connections/tasks that survive cleanup.
+        import os
+        os._exit(0)
     except KeyboardInterrupt:
         typer.echo("\nInterrupted.", err=True)
         raise typer.Exit(code=130)