## Summary
- Local `fusion/*` branches for **done** tasks kept unique tip SHAs
after squash/AI merge, so self-healing logged
`stale-active-branch-rescue-needed` on every maintenance sweep without
ever deleting them.
- **Completion fan-out** now force-deletes the task branch even when
unique commits remain (squash-safe).
- **`reclaim-stale-active-branches`** force-deletes complete-lane
leftovers (`reason=complete-column-unique-commits-force`) and no longer
emits rescue-needed for those lanes; non-complete columns still warn and
preserve unmerged work. Archived lanes still skip reclaim entirely.
Also cleaned up 116 leftover local fusion branches on this machine
(done/orphan only; 9 active kept).
## Test plan
- [x] `pnpm --filter @fusion/engine exec vitest run
src/__tests__/self-healing-completion-fanout.test.ts
src/__tests__/self-healing.test.ts -t "SelfHealingManager
reclaimStaleActiveBranches|self-healing completion
fan-out|force-deletes"`
- [ ] After merge/restart engine: confirm logs no longer spam
rescue-needed for done tasks
- [ ] Confirm active todo/in-progress fusion branches still get
rescue-needed when unique and no worktree
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved cleanup of stale task branches after completion, including
branches with unique commits remaining after squash or AI-assisted
merges.
* Completed tasks now reliably remove residual branches and worktree
metadata.
* Non-completed tasks continue to preserve recoverable branches and
display rescue warnings.
* Added clearer recovery logging and audit records for forced branch
cleanup.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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