chore: initial monorepo scaffold + WDS Phase 1+2 artifacts

- Nx 22.7 monorepo (pnpm 11.1, TypeScript 5.9, Node 24)
- apps/api: NestJS 11 (CJS conforme CODING-RULES.md PGD-DB-004)
- apps/web: React 19 + Vite 8 (ESM)
- libs/shared/api-interface: Zod contract base
- Docker Compose dev: Postgres 18, Valkey 8, MinIO, Mailpit
- WDS artifacts:
  - design-artifacts/A-Product-Brief/ (5 docs canônicos + 16 dialogs)
  - design-artifacts/B-Trigger-Map/ (hub + 4 personas + feature impact)
- Stack canon: STACK.md v2.2 + CODING-RULES.md v2.0 + brand.md
- AGENTS.md + README.md como entrada para devs/agentes

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/skills/bmad-testarch-trace/workflow-plan.md

@@ -0,0 +1,24 @@
+# Workflow Plan: testarch-trace
+
+## Create Mode (steps-c)
+
+- step-01-load-context.md
+- step-02-discover-tests.md
+- step-03-map-criteria.md
+- step-04-analyze-gaps.md
+- step-05-gate-decision.md
+
+## Validate Mode (steps-v)
+
+- step-01-validate.md
+
+## Edit Mode (steps-e)
+
+- step-01-assess.md
+- step-02-apply-edit.md
+
+## Outputs
+
+- {test_artifacts}/traceability-matrix.md
+- {test_artifacts}/e2e-trace-summary.json
+- {test_artifacts}/gate-decision.json (when gate-eligible)