## Summary
- add an atomic PostgreSQL operation that reconciles a mission feature
with a terminal delivery task
- support retained archived-task evidence without unarchiving or waking
mission automation
- reject missing, active, deleted-without-archive, and duplicate-linked
task evidence without partial mutation
- route the reconciliation endpoint through the transactional store
operation
## Root cause
Mission reconciliation previously relied on ordinary task-link and
lifecycle paths that cannot safely use retained archived task evidence.
That made historical delivery repair either impossible or vulnerable to
partial linkage and unintended mission-loop side effects.
## Scope
This PR contains the reusable product capability recovered from FX-001.
It intentionally does not perform the project-specific 69-row live data
mutation; that operational reconciliation was blocked by ambiguous
evidence and belongs outside the source change.
## Validation
- PostgreSQL mission-store tests: 23 passed
- dashboard reconciliation route tests: 3 passed
- `@fusion/core` typecheck
- `@fusion/dashboard` typecheck
- targeted ESLint
- strict changeset validation
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added safer reconciliation for completed mission features using
validated terminal task evidence.
* Supports eligible archived tasks without restoring or relinking them.
* Reconciliation is idempotent and updates related mission progress
consistently.
* **Bug Fixes**
* Prevented conflicting or invalid task evidence from changing mission
state.
* Added atomic rollback when reconciliation encounters an error.
* Improved API responses for missing resources and reconciliation
conflicts.
* **Documentation**
* Expanded reconciliation safety, error, idempotency, and
duplicate-cleanup guidance.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: fusion-merge-train <merge-train@topkoli.local>
Co-authored-by: Fusion <noreply@runfusion.ai>
8e6985aed3