* feat: add `crypto-js`, `encryptString` with sample key
* feat: include POSTGRES_PASSWORD in generated .env.test
* feat: include POSTGRES_PASSWORD in turbo.json for studio
* feat: read only query support
* feat: configurable `POSTGRES_HOST`, `POSTGRES_DB`, `POSTGRES_PORT`
* chore: rename POSTGRES_USER to clarify write permission
* feat: configurable `PG_META_CRYPTO_KEY`
* chore: add `PG_META_CRYPTO_KEY` to generateLocalEnv
* feat: add 'postgres-meta' to linter dictionary
* feat: restore read-only toggle in local MCP URL builder