feat(F-001): scaffold modular monolith skeleton with boundary checker

- TypeScript + Fastify skeleton under project/ (src/modules, shared, infrastructure, app)
- scripts/check-module-boundaries.mjs enforcing module public-API rules (tested with fixtures)
- GET /health endpoint, error envelope without stack leakage
- specs/F-001-scaffold (SPEC/DESIGN/TASKS/TESTS), spec/tech.md dependency justification
- 30-ticket MercadoDeVida roadmap in backlog/features.json, spec/roadmap.md
- All gates approved: reviewer, security, qa; verify.sh green

work/artifacts/F-001/reviewer.json

@@ -0,0 +1,32 @@
+{
+  "feature_id": "F-001",
+  "agent": "reviewer",
+  "verdict": "APPROVED",
+  "summary": "Scaffold matches specs/F-001-scaffold DESIGN.md. Layout, composition root, boundary rules, error envelope and toolchain all verified by re-running commands against the tree. No blockers.",
+  "checks": {
+    "layout_matches_design": "PASS: src/{app,infrastructure,modules,shared} present; health exemplar exposes public API only via index.ts",
+    "boundary_rules": "PASS: R1 (module escape) and R2 (deep import from outside) enforced by scripts/check-module-boundaries.mjs, demonstrated by fixture tests (7 file(s) checked clean)",
+    "composition_root": "PASS: only src/app/build-app.ts wires modules; server.ts is a thin entrypoint",
+    "error_handling": "PASS: single error envelope, 404 handler, 500 message generic (no stack leak)",
+    "toolchain_green": "PASS: lint, lint:boundaries, typecheck, build, test all exit 0; 3 test files / 7 tests passed"
+  },
+  "findings": [
+    {
+      "severity": "info",
+      "note": "Boundary checker is regex-based over static import/export specifiers; documented limitation acceptable for TS ESM, revisit only if dynamic imports appear."
+    },
+    {
+      "severity": "info",
+      "note": "Implementer evidence shows the checker caught a real violation during build (test escaping module) and fixed it architecturally - rule is effective, not decorative."
+    }
+  ],
+  "evidence": [
+    "npm run lint -> exit 0 (eslint + prettier)",
+    "npm run lint:boundaries -> Boundary check OK: 7 file(s) checked",
+    "npm run typecheck -> exit 0",
+    "npm test -> Test Files 3 passed (3), Tests 7 passed (7)",
+    "files reviewed: project/src/**, project/scripts/**, project/*.json, project/eslint.config.mjs",
+    "specs compared: specs/F-001-scaffold/SPEC.md, DESIGN.md, TASKS.md, TESTS.md"
+  ],
+  "timestamp": "2026-08-14T19:46:00Z"
+}