feat: verify acceptance criteria for foundation layer

Mark Task 8 complete after verifying: go build succeeds, config loads
from YAML, all 3 database tables created via migrations, all CRUD
operations work, Docker builds, all 53 tests pass, go vet clean,
gofmt clean, coverage exceeds 70% for foundation packages.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/plans/2026-05-20-foundation-layer.md

@@ -124,15 +124,15 @@ Build the foundation layer of NaviWatcher: a greenfield Go project with zero exi
 - [x] run full test suite — must pass before task 8
 
 ### Task 8: Verify acceptance criteria
-- [ ] verify Go module builds cleanly with `go build`
-- [ ] verify config loads and validates from YAML file
-- [ ] verify all 3 database tables are created via migrations
-- [ ] verify all CRUD operations work against in-memory SQLite
-- [ ] verify Docker image builds and container starts
-- [ ] run full test suite: `go test ./... -v` — all must pass
-- [ ] run `go vet ./...` — no issues
-- [ ] run `go fmt ./...` — no formatting issues
-- [ ] verify test coverage is reasonable for foundation layer (70%+)
+- [x] verify Go module builds cleanly with `go build`
+- [x] verify config loads and validates from YAML file
+- [x] verify all 3 database tables are created via migrations
+- [x] verify all CRUD operations work against in-memory SQLite
+- [x] verify Docker image builds and container starts
+- [x] run full test suite: `go test ./... -v` — all must pass
+- [x] run `go vet ./...` — no issues
+- [x] run `go fmt ./...` — no formatting issues
+- [x] verify test coverage is reasonable for foundation layer (70%+)
 
 ### Task 9: Final documentation update
 - [ ] update README.md with current build/run/test instructions (replace placeholder commands)