Add document converter, seeder data structure, and project wiki

- ai-service/convert.py: converts Office/PDF files to markdown with frontmatter
- database/seeders/data/: folder structure for themas, projects, documents, etc.
- database/seeders/data/raw/: drop zone for Office/PDF files to convert
- wiki/: project architecture, concepts, and knowledge graph documentation
- Remove unused Laravel example tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

wiki/architecture/system-architecture.md

@@ -0,0 +1,109 @@
+---
+title: System Architecture
+created: 2026-04-08
+updated: 2026-04-08
+status: evolving
+tags: [architecture, stack, docker, layers]
+sources: [docker-compose.yml, composer.json, package.json, ai-service/app/main.py]
+---
+
+# System Architecture
+
+## Stack
+
+| Layer | Technology | Version |
+|---|---|---|
+| Backend | Laravel (PHP) | 13.0 / PHP 8.3+ |
+| Frontend | Vue 3 + Inertia.js | Vue 3.5, Inertia 3 |
+| Build | Vite | 8.0 |
+| Styling | Tailwind CSS | 4.2 |
+| Visualization | D3.js | 7.9 |
+| Database | PostgreSQL + pgvector | 16 |
+| Cache / Queue | Redis | alpine |
+| AI Service | Python FastAPI | 0.1.0 |
+| Auth | Laravel Fortify + Sanctum | Fortify 1.36, Sanctum 4.0 |
+| Fonts | VT323, Press Start 2P, IBM Plex Mono | — |
+
+## Architecture Principles
+
+1. **Service-oriented** — domain logic lives in service classes (`app/Services/`), not controllers
+2. **Event-driven** — status transitions go through transactional methods with audit logging
+3. **API-first** — all functionality reachable via REST endpoints
+4. **Audit trail** — all mutations logged to `audit_logs` table (append-only)
+5. **AI content labeled** — AI-generated content marked and requires human confirmation
+6. **Inertia SPA** — server-side routing (Laravel) with client-side rendering (Vue 3), no separate API layer needed for pages
+
+## Docker Topology
+
+```
+┌─────────────────────────────────────────────────────────┐
+│  nginx:alpine  ─────────────────────────────→  :80      │
+│      │                                                   │
+│      ▼                                                   │
+│  laravel-app (PHP 8.4-FPM)                              │
+│      │                                                   │
+│      ├── laravel-worker (queue:work)                     │
+│      ├── laravel-scheduler (cron)                        │
+│      │                                                   │
+│  ┌───▼────────────┐    ┌─────────────────┐              │
+│  │ postgresql:16   │    │  redis:alpine   │              │
+│  │ + pgvector      │    │  cache/queue    │              │
+│  │        :5432    │    │       :6379     │              │
+│  └─────────────────┘    └─────────────────┘              │
+│                                                          │
+│  ai-service (Python FastAPI)  ──────────────→  :8000     │
+│      └── connects to postgresql for embeddings           │
+└─────────────────────────────────────────────────────────┘
+```
+
+7 services total. All on `innovatieplatform` bridge network.
+
+## Data Flow
+
+### Page Rendering (Inertia)
+
+```
+Browser → nginx → PHP-FPM → Laravel Router → Controller
+    → Service (business logic)
+    → Inertia::render('Page', $data)
+    → Vue component receives props
+    → D3.js renders metro map canvas
+```
+
+### API Calls (Map data)
+
+```
+Vue component → axios GET /api/map/strategy
+    → MapController::apiStrategy()
+    → MapDataService::getStrategyMap()
+    → Eloquent queries (Thema → Speerpunten → Projects)
+    → JSON response {lines, nodes, connections, level}
+    → D3 re-renders canvas
+```
+
+### AI Integration (planned)
+
+```
+CliBar.vue → POST /api/chat
+    → Laravel proxy → ai-service:8000/api/chat
+    → LangGraph agent → Anthropic Claude
+    → RAG: pgvector similarity search on documents
+    → Response with source attribution
+    → CliBar displays with [AI] prefix
+```
+
+## Key Service Classes
+
+| Service | LOC | Responsibility |
+|---|---|---|
+| `ProjectService` | 186 | Project CRUD, lifecycle transitions, park/stop, audit logging |
+| `MapDataService` | 165 | Build metro map data structures (Level 1: strategy, Level 2: project) |
+| `ThemaService` | 60 | Theme CRUD operations |
+
+## Configuration
+
+- **Session/Cache/Queue**: All Redis-backed (`config/session.php`, `config/cache.php`, `config/queue.php`)
+- **Database**: PostgreSQL with pgvector extension for embedding vectors
+- **Auth**: Fortify handles registration/login/password flows, Sanctum for API tokens
+- **OPcache**: Production-optimized (`docker/php/opcache.ini`)
+- **Gzip**: Enabled in nginx config