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/wds-0-alignment-signoff/data/04-generate-signoff-routing.md

@@ -0,0 +1,31 @@
+---
+name: generate-signoff
+description: Offer and prepare signoff document after alignment acceptance
+web_bundle: true
+---
+
+# Phase 4: Generate Signoff
+
+**Goal:** After alignment document is accepted, offer to create a signoff document to formalize the commitment.
+
+**Your Role:** Determine which type of signoff document is needed and route to the appropriate builder.
+
+---
+
+## Steps
+
+| # | File | Purpose |
+|---|------|---------|
+| 01 | [Offer Signoff Document](01-offer-signoff-document.md) | Offer to generate signoff document after acceptance |
+| 02 | [Determine Business Model](02-determine-business-model.md) | Determine payment model for external contracts |
+
+**Routes to:**
+- External contract → `../05-build-contract/workflow.md`
+- Internal signoff → `../06-build-signoff-internal/workflow.md`
+- Skip signoff → Proceed to Project Brief
+
+---
+
+## INITIALIZATION
+
+Load and execute `01-offer-signoff-document.md` to begin.