docs(14-01): complete database foundation plan

- Created 14-01-SUMMARY.md with execution results
- Updated STATE.md with plan progress and decisions
- Updated ROADMAP.md progress table (1/6 plans)
- Marked DB-01 and DB-03 requirements complete

.planning/ROADMAP.md

@@ -123,7 +123,7 @@ Plans:
   4. Docker Compose brings up Postgres alongside the app with a single command for local development
 **Plans:** 6 plans
 Plans:
-- [ ] 14-01-PLAN.md — Schema rewrite (pg-core), DB config (postgres.js), test helper (PGlite), Drizzle config, initial migration
+- [x] 14-01-PLAN.md — Schema rewrite (pg-core), DB config (postgres.js), test helper (PGlite), Drizzle config, initial migration
 - [ ] 14-02-PLAN.md — Docker Compose dev/prod + Dockerfile update for PostgreSQL
 - [ ] 14-03-PLAN.md — All 9 services async conversion + seed + server index
 - [ ] 14-04-PLAN.md — All 9 route handlers async conversion
@@ -195,7 +195,7 @@ Plans:
 | 11. Candidate Ranking | v1.3 | 2/2 | Complete | 2026-03-16 |
 | 12. Comparison View | v1.3 | 1/1 | Complete | 2026-03-17 |
 | 13. Setup Impact Preview | v1.3 | 0/2 | Not started | - |
-| 14. PostgreSQL Migration | v2.0 | 0/6 | Not started | - |
+| 14. PostgreSQL Migration | v2.0 | 1/6 | In progress | - |
 | 15. External Authentication | v2.0 | 0/? | Not started | - |
 | 16. Multi-User Data Model | v2.0 | 0/? | Not started | - |
 | 17. Object Storage | v2.0 | 0/? | Not started | - |