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>

.agents/skills/bmad-story-automator/data/report-retention-policy.md

@@ -0,0 +1,30 @@
+# Validation Report Retention Policy
+
+Purpose: keep workflow repo lean while preserving historical validation evidence.
+
+## Policy
+
+- Keep latest 10 validation reports in `validation-reports/` as `.md`.
+- Archive older reports into `validation-reports/archive/` as `.md.gz`.
+- Keep `validation-report-*-current.md` files unarchived.
+- Never delete archived `.md.gz` files automatically.
+
+## Suggested Maintenance Command
+
+Run from workflow root:
+
+```bash
+mkdir -p validation-reports/archive
+ls -1t validation-reports/validation-report-*.md \
+  | rg -v -- '-current\.md$' \
+  | awk 'NR>10' \
+  | while read -r f; do
+      gzip -c "$f" > "validation-reports/archive/$(basename "$f").gz" && rm "$f"
+    done
+```
+
+## Operational Notes
+
+- This policy applies to historical reports only.
+- Current run artifacts remain readable markdown.
+- Archival is optional during active development, recommended during wrap-up.