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/knowledge-graph.yaml

@@ -0,0 +1,141 @@
+# Innovatieplatform — Structured Knowledge Graph
+# Single source of truth for numbers, metrics, and verifiable claims.
+# Last updated: 2026-04-08
+
+# ── TESTS ──
+tests:
+  phpunit_feature:
+    count: 0
+    passing: 0
+    file: tests/Feature/
+    date: 2026-04-08
+  phpunit_unit:
+    count: 0
+    passing: 0
+    file: tests/Unit/
+    date: 2026-04-08
+
+# ── METRICS ──
+metrics:
+  backend_loc:
+    value: "~13,500"
+    source: "wc -l on PHP files excl. vendor"
+    date: 2026-04-08
+  frontend_loc:
+    value: "~3,900"
+    source: "wc -l on Vue/JS files excl. node_modules"
+    date: 2026-04-08
+  eloquent_models:
+    value: 21
+    source: "ls app/Models/"
+    date: 2026-04-08
+  enums:
+    value: 14
+    source: "ls app/Enums/"
+    date: 2026-04-08
+  migrations:
+    value: 27
+    source: "ls database/migrations/"
+    date: 2026-04-08
+  vue_components:
+    value: 15
+    source: "find resources/js -name '*.vue'"
+    date: 2026-04-08
+  docker_services:
+    value: 7
+    source: docker-compose.yml
+    date: 2026-04-08
+  git_commits:
+    value: 7
+    source: "git log --oneline"
+    date: 2026-04-08
+
+# ── DISPROVEN CLAIMS ──
+disproven: {}
+
+# ── PERFORMANCE ──
+performance: {}
+
+# ── ARCHITECTURE ──
+architecture:
+  backend: "Laravel 13.0 (PHP 8.3+)"
+  frontend: "Vue 3.5 + Inertia.js 3 + Vite 8"
+  database: "PostgreSQL 16 + pgvector"
+  ai_service: "Python FastAPI + LangGraph"
+  cache_queue: "Redis (cache, session, queue)"
+  styling: "Tailwind CSS 4.2"
+  visualization: "D3.js 7.9"
+  auth: "Laravel Fortify + Sanctum"
+  infrastructure: "Docker Compose (7 services)"
+
+# ── DOMAIN MODEL ──
+domain_model:
+  strategic_layer:
+    - Thema
+    - Speerpunt
+    - RoadmapItem
+  project_layer:
+    - Project
+    - Fase
+    - Risico
+    - Afhankelijkheid
+  commitment_layer:
+    - Commitment
+    - Actie
+  governance_layer:
+    - Besluit
+    - Budget
+    - Besteding
+  knowledge_layer:
+    - Document
+    - KennisArtikel
+    - LessonLearned
+    - Tag
+  handover_layer:
+    - Overdrachtsplan
+    - Criterium
+    - Acceptatie
+  auth_layer:
+    - User
+    - Role
+    - ProjectUser
+  system_layer:
+    - AuditLog
+
+# ── LIFECYCLE PHASES ──
+lifecycle_phases:
+  - signaal
+  - verkenning
+  - concept
+  - experiment
+  - pilot
+  - besluitvorming
+  - overdracht_bouwen
+  - overdracht_beheer
+  - evaluatie
+
+# ── SPRINT STATUS ──
+sprint_status:
+  sprint_0_scaffold: completed
+  sprint_1_foundation: completed
+  sprint_2_detail: not_started
+
+# ── DATA SOURCES ──
+data_sources: {}
+
+# ── TIMELINE ──
+timeline:
+  - date: 2026-04-01
+    desc: "Initial scaffold: Laravel 13, Vue 3, Docker, domain model"
+  - date: 2026-04-01
+    desc: "Style guide: metro map + retro-futurism aesthetic"
+  - date: 2026-04-02
+    desc: "Sprint 1: Auth, metro map canvas, services, retro UI"
+  - date: 2026-04-02
+    desc: "Fix Dutch model table names and enum values"
+  - date: 2026-04-02
+    desc: "Performance: OPcache, gzip, font subsetting, lazy loading"
+  - date: 2026-04-02
+    desc: "Logout button, metro label positioning fixes"
+  - date: 2026-04-08
+    desc: "Wiki initialized from wiki-template"