feat: implement metadata catalog database management

backend/package.json

@@ -6,6 +6,7 @@
     "dev": "tsx watch src/server.ts",
     "prebuild": "node scripts/clean-dist.mjs",
     "build": "tsc -p tsconfig.json",
+    "catalog:migrate": "node dist/catalog/migrate.js",
     "test": "vitest run",
     "start": "node dist/server.js",
     "test:schema-v3-verifier": "python3 -I -B scripts/test_revision_state_policy.py && node --test scripts/verify-workspace-descriptor-files.test.mjs scripts/revision-state-policy.test.mjs"
@@ -16,12 +17,14 @@
     "@fastify/rate-limit": "11.2.0",
     "@types/pg": "^8.20.3",
     "fastify": "^5.0.0",
+    "kysely": "^0.29.5",
     "openid-client": "6.8.5",
     "pg": "^8.22.0",
     "yaml": "^2.9.0",
     "zod": "^4.4.3"
   },
   "devDependencies": {
+    "@testcontainers/postgresql": "^12.1.0",
     "@types/node": "24.13.3",
     "tsx": "^4.19.0",
     "typescript": "^5.6.0",