The activator process does not terminate on SIGTERM or SIGINT (Ctrl+C). It keeps running until forced with SIGKILL (kill -9). This suggests at least one thread/task is blocking shutdown (e.g., waiting on a channel/condvar, a blocking I/O, or a join() that never returns).

Steps to Reproduce

1. Start the activator normally.
2. Send SIGTERM (kill -TERM ) or press Ctrl+C in the foreground.
3. Observe that the process remains alive indefinitely.
4. Only kill -9 terminates it.

Expected Behavior

• On SIGTERM/SIGINT, activator begins graceful shutdown:
  • Broadcasts a shutdown signal to workers.
  • Stops background tasks and closes sockets.
  • Exits cleanly within 5–10s with code 0 (or a specific non-zero if failures occur).

Actual Behavior

• No clean shutdown; process stays running
• Requires kill -9.