Tanmoy Sarkar 87bc4cf70e feat(companion): Implement BACKOFF with fixed restart delay
Reaping now transitions each exited companion via handle_exit: a manually
stopped one settles in STOPPED, any other exit enters BACKOFF with
next_retry_at = now + restart_delay (fixed, no exponential backoff or cap).
Add retry_backoff to re-fork BACKOFF companions once their delay elapses,
bumping restart_count and returning them to STARTING.

Add tests for backoff on unexpected exit, manual-stop staying stopped, retry
timing, and reap-to-backoff.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-09 17:56:22 +05:30
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