**Problem:** Self-healing repeatedly spawned git children
(status/rev-parse/for-each-ref) for paused/idle projects on every sweep,
and certain repair sweeps ran unbounded — a spawn/git storm that spiked
CPU and I/O on the production host.
**Fix:** Bound self-healing git work for paused projects (skip/cooldown)
and cap the repair sweeps so the engine stops churning git processes
when there is nothing actionable. Includes in-process-runtime pause-gate
+ self-healing pause-storm regression tests.
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## Summary by CodeRabbit
- **Bug Fixes**
- Paused projects no longer trigger Git-intensive self-healing
maintenance.
- Pause and unpause transitions now correctly stop and resume
maintenance scheduling.
- Global and engine-level pauses are handled consistently.
- **Improvements**
- Active-project Git maintenance is limited to an hourly cadence,
reducing unnecessary activity.
- Merge-metadata recovery is capped at 25 items per cycle for more
predictable processing.
- Database and filesystem housekeeping continues during pauses.
- **Documentation**
- Updated architecture and runtime documentation to describe pause-aware
maintenance behavior.
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