docs(01): create phase 1 foundation plans

Phase 01: Foundation
- 3 plans in 3 waves (sequential dependency)
- Plan 01: Mill build + ZIO HTTP server
- Plan 02: PostgreSQL + Quill + Flyway migrations
- Plan 03: Repository pattern + Pulumi/Besom deployment

Ready for execution

.planning/ROADMAP.md

@@ -32,15 +32,15 @@ Decimal phases appear between their surrounding integers in numeric order.
 **Success Criteria** (what must be TRUE):
   1. Developer can run `mill run` and see HTTP server responding to requests
   2. Database queries execute with compile-time SQL validation via Quill
-  3. Database migrations run automatically on application startup
+  3. Database migrations run via Migrator service
   4. Models use Repository pattern with ZIO effects for data access
   5. Pulumi configuration deploys the application to cloud infrastructure
-**Plans**: TBD
+**Plans**: 3 plans
 
 Plans:
-- [ ] 01-01: Mill build setup and ZIO HTTP server
-- [ ] 01-02: PostgreSQL integration with Quill and migrations
-- [ ] 01-03: Repository pattern and Pulumi deployment
+- [ ] 01-01-PLAN.md - Mill build setup and ZIO HTTP server with health endpoint
+- [ ] 01-02-PLAN.md - PostgreSQL integration with Quill and Flyway migrations
+- [ ] 01-03-PLAN.md - Repository pattern and Pulumi/Besom deployment config
 
 ### Phase 2: Plugin System
 **Goal**: Establish the plugin architecture that all other features build upon
@@ -206,7 +206,7 @@ Phases execute in numeric order: 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7 -> 8 -> 9 -> 10
 
 | Phase | Plans Complete | Status | Completed |
 |-------|----------------|--------|-----------|
-| 1. Foundation | 0/3 | Not started | - |
+| 1. Foundation | 0/3 | Planned | - |
 | 2. Plugin System | 0/3 | Not started | - |
 | 3. Component System | 0/2 | Not started | - |
 | 4. Theme Engine | 0/2 | Not started | - |