## Summary
- Full Suite
[29644469846](https://github.com/Runfusion/Fusion/actions/runs/29644469846):
shards 1–3 green; shard 4 failed `github-issue-comment`
(`this.store.getTask is not a function`).
- Tracking Done comments re-read the task for landing-commit metadata;
MockStore now implements `getTask` (null → product snapshot fallback).
## Test plan
- [x] `github-issue-comment.test.ts` — 33 passed
- [ ] Full Suite all 4 shards green on main
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Tests**
* Updated GitHub issue comment test scaffolding to support task lookups
during completion handling.
* Kept comment-posting assertions deterministic.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
caffc0d40d