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/tools/lint.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+# Wiki health check — find issues
+# Usage: ./wiki/tools/lint.sh
+
+WIKI_DIR="$(dirname "$(dirname "$(readlink -f "$0")")")"
+
+echo "=== Wiki Health Check ==="
+echo ""
+
+echo "-- Page count --"
+find "$WIKI_DIR" -name "*.md" -not -path "*/tools/*" | wc -l
+echo " total pages"
+echo ""
+
+echo "-- Orphans (not linked from other pages) --"
+for f in $(find "$WIKI_DIR" -name "*.md" -not -name "index.md" -not -name "log.md" -not -name "SCHEMA.md" -not -path "*/tools/*"); do
+    basename=$(basename "$f" .md)
+    refs=$(grep -rl --include="*.md" "$basename" "$WIKI_DIR" 2>/dev/null | grep -v "$f" | wc -l)
+    if [ "$refs" -eq 0 ]; then
+        echo "  ORPHAN: $f"
+    fi
+done
+echo ""
+
+echo "-- Status distribution --"
+for status in proven disproven evolving speculative; do
+    count=$(grep -rl "status: $status" "$WIKI_DIR" --include="*.md" 2>/dev/null | wc -l)
+    echo "  $status: $count"
+done
+echo ""
+
+echo "-- Pages missing frontmatter --"
+for f in $(find "$WIKI_DIR" -name "*.md" -not -name "SCHEMA.md" -not -path "*/tools/*"); do
+    if ! head -1 "$f" | grep -q "^---"; then
+        echo "  NO FRONTMATTER: $f"
+    fi
+done
+echo ""
+
+echo "-- Index completeness --"
+indexed=$(grep -c '\[.*\](.*\.md)' "$WIKI_DIR/index.md" 2>/dev/null)
+total=$(find "$WIKI_DIR" -name "*.md" -not -name "index.md" -not -name "log.md" -not -name "SCHEMA.md" -not -path "*/tools/*" | wc -l)
+echo "  Indexed: $indexed / Total: $total"
+echo ""
+
+echo "=== Done ==="