Implement step recovery mechanism for stuck molecule steps (MVP):
- Add Release() and ReleaseWithReason() to beads wrapper
- Create gt release command to move in_progress → open
- Clears assignee so step can be claimed by another worker
- Optionally adds reason as note for tracking
Usage:
gt release <id> # Release single issue
gt release <id> -r "why" # Release with reason
This enables nondeterministic idempotence - stuck steps can be
safely recovered and retried by releasing and reclaiming.
Closes gt-g44u.4
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
