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/wds-1-project-brief/templates/project-brief-dialog/decisions.md

@@ -0,0 +1,85 @@
+# Key Decisions Log
+
+**Project:** {{project_name}}
+**Format:** Append-only decision log
+
+---
+
+## Decision 1: {{decision_topic}}
+
+**Date:** {{date}}
+**Step:** {{step_where_decided}}
+**Session:** {{session_number}}
+
+**Context:**
+{{what_prompted_this_decision}}
+
+**What was decided:**
+{{the_decision}}
+
+**Why:**
+{{rationale}}
+
+**Impact:**
+{{how_this_shapes_project}}
+
+**Alternatives considered:**
+- {{option_1}} — {{why_not}}
+- {{option_2}} — {{why_not}}
+
+**Documented in:** {{file_path}}
+
+---
+
+## Decision 2: {{decision_topic}}
+
+**Date:** {{date}}
+**Step:** {{step_where_decided}}
+**Session:** {{session_number}}
+
+**Context:**
+{{what_prompted_this_decision}}
+
+**What was decided:**
+{{the_decision}}
+
+**Why:**
+{{rationale}}
+
+**Impact:**
+{{how_this_shapes_project}}
+
+**Alternatives considered:**
+- {{option_1}} — {{why_not}}
+- {{option_2}} — {{why_not}}
+
+**Documented in:** {{file_path}}
+
+---
+
+## Decision 3: {{decision_topic}}
+
+**Date:** {{date}}
+**Step:** {{step_where_decided}}
+**Session:** {{session_number}}
+
+**Context:**
+{{what_prompted_this_decision}}
+
+**What was decided:**
+{{the_decision}}
+
+**Why:**
+{{rationale}}
+
+**Impact:**
+{{how_this_shapes_project}}
+
+**Alternatives considered:**
+- {{option_1}} — {{why_not}}
+
+**Documented in:** {{file_path}}
+
+---
+
+_Continue appending decisions as they're made throughout the Product Brief process._