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/qa.json

@@ -0,0 +1,42 @@
+{
+  "feature_id": "F-001",
+  "agent": "qa",
+  "verdict": "APPROVED",
+  "summary": "All 5 acceptance criteria verified with fresh executions against the final tree. No regressions (greenfield baseline).",
+  "traceability": [
+    {
+      "criterion": "AC1: npm install, build, lint, typecheck, test all green in project/",
+      "test": "fresh run of npm run build && typecheck && lint && lint:boundaries && test",
+      "result": "PASS (all exit 0; 3 test files / 7 tests passed)"
+    },
+    {
+      "criterion": "AC2: GET /health returns 200 {\"status\":\"ok\"}",
+      "test": "vitest inject tests (health.test.ts, build-app.test.ts) + live smoke: PORT=3998 node dist/infrastructure/http/server.js; curl /health",
+      "result": "PASS (HTTP 200 {\"status\":\"ok\"} live)"
+    },
+    {
+      "criterion": "AC3: src/modules, src/shared, src/infrastructure, src/app exist",
+      "test": "ls -d over project/src",
+      "result": "PASS (all four directories present)"
+    },
+    {
+      "criterion": "AC4: cross-module internal import fails boundary check",
+      "test": "node scripts/check-module-boundaries.mjs scripts/tests/fixtures/cross-module-internal + boundary-checker.test.ts fixtures",
+      "result": "PASS (exit 1, R1 violation reported)"
+    },
+    {
+      "criterion": "AC5: ./scripts/verify.sh green at repo root",
+      "test": "./scripts/verify.sh",
+      "result": "PASS (exit 0, 'Orquestra verificado')"
+    }
+  ],
+  "regressions": "n/a - greenfield ticket, no prior behavior to regress",
+  "evidence": [
+    "project/: npm run build/typecheck/lint/lint:boundaries/test -> all exit 0",
+    "npm test -> Test Files 3 passed (3), Tests 7 passed (7)",
+    "live smoke on PORT=3998 -> 200 {\"status\":\"ok\"}",
+    "boundary checker on violation fixture -> exit 1 with R1 violation message",
+    "./scripts/verify.sh -> exit 0"
+  ],
+  "timestamp": "2026-08-14T19:50:00Z"
+}