fix: crash loop recovery, auto-migrations, CI test pipeline

- Wrap startup syncs in safeStartup() to prevent crash on external service failure
- Add migrate-entrypoint.sh for auto-generating migrations from schema diff
- Update Dockerfile migration stage to use entrypoint script
- Add test job to build-and-publish workflow (runs before build)
- Add tests.yaml workflow to run tests on every push
- Fix test setup to use real RSA key pair instead of plain strings
- Add test script to package.json

package.json

@@ -19,6 +19,7 @@
   },
   "scripts": {
     "dev": "NODE_ENV=development bun --watch src/index.ts",
+    "test": "bun test --preload ./tests/setup.ts",
     "db:gen": "prisma generate",
     "db:push": "prisma migrate dev --skip-generate",
     "db:deploy": "prisma migrate deploy",