## Summary
Engine and dashboard traffic now stays on the authoritative PostgreSQL
layer across execution, recovery, project discovery, planning sessions,
analytics, and shutdown. The dashboard no longer presents a migration
notice for a cutover that is already mandatory.
## Design decisions
- Runtime composition requires an async data layer instead of
constructing a hidden SQLite fallback.
- Engine workflow, mission, claim, and self-healing reads await their
PostgreSQL-backed store contracts.
- Project-scoped dashboard stores retain and close their backend owner
exactly once.
- The dashboard test quarantine entry remains paired with its Vitest
exclusion, preserving the repository’s deletion-ratchet policy.
## Validation
- Core, Engine, Dashboard, CLI, and Desktop typechecks pass on the
stacked branch.
- `pnpm test:gate` passes all 478 gate tests.
- This PR changes 62 files.
## Stack
- Depends on #2108.
- CLI/desktop/ops, plugins, and docs/release follow in later PRs.
Related: #2105
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Project discovery now recognizes projects using the
`.fusion/project.json` marker.
* Knowledge indexing and search are more reliable across project-scoped
storage.
* **Bug Fixes**
* Improved session, audit timeline, approval, monitoring, and analytics
data consistency.
* Prevented stale planning-session updates and project-store shutdown
races.
* Ensured chat usage and CLI session status are saved before continuing.
* **UI Changes**
* Removed the storage migration notice banner now that the PostgreSQL
transition is complete.
* **Reliability**
* Improved shutdown handling, workflow execution, and worktree behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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