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/metrics.md

@@ -0,0 +1,55 @@
+---
+title: Metrics Dashboard
+created: 2026-04-08
+updated: 2026-04-08
+status: evolving
+tags: [metrics, tests, performance]
+sources: [phpunit.xml, composer.json, package.json]
+---
+
+# Metrics Dashboard
+
+All numbers with provenance. Source of truth: `knowledge-graph.yaml`.
+
+## Test Results
+
+| Suite | Score | File | Date |
+|---|---|---|---|
+| PHPUnit Feature | 0/0 | tests/Feature/ | 2026-04-08 |
+| PHPUnit Unit | 0/0 | tests/Unit/ | 2026-04-08 |
+
+> No tests written yet. PHPUnit 12.5 is configured and ready.
+
+## Codebase Size
+
+| Metric | Value | Source |
+|---|---|---|
+| Backend LOC | ~13,500 | PHP files excl. vendor |
+| Frontend LOC | ~3,900 | Vue/JS files excl. node_modules |
+| Models | 21 | app/Models/ |
+| Enums | 14 | app/Enums/ |
+| Migrations | 27 | database/migrations/ |
+| Vue components | 15 | resources/js/ |
+| Docker services | 7 | docker-compose.yml |
+
+## Build Dependencies
+
+| Layer | Package Manager | Production | Dev |
+|---|---|---|---|
+| Backend | Composer | 5 (Laravel, Fortify, Sanctum, Inertia, Tinker) | 6 (Faker, Pail, Pint, Mockery, Collision, PHPUnit) |
+| Frontend | npm | 8 (Vue, Inertia, D3, Pinia, VueUse, fonts) | 6 (Tailwind, Vite, Axios, Concurrently, Laravel-Vite) |
+| AI Service | pip | FastAPI, LangGraph, LangChain, Anthropic, pgvector | — |
+
+## Sprint Progress
+
+| Sprint | Status | Key Deliverables |
+|---|---|---|
+| Sprint 0 — Scaffold | completed | Domain model, Docker, migrations, seeders, agent definitions |
+| Sprint 1 — Foundation | completed | Auth (Fortify), metro map canvas (D3), services, retro UI |
+| Sprint 2 — Detail & Interaction | not started | Project detail view, zoom-to-dimension, commitment UI |
+
+## Disproven Claims
+
+| Claim | Evidence For | Evidence Against | Date |
+|---|---|---|---|
+| (none yet) | — | — | — |