Database queries, preview controls, safer deploys

- Your coding agent can now query your Specific Postgres databases from the CLI. With
specific query --db <name>, it can inspect live data while debugging. Database queries are read-only, so it cannot accidentally change production data. - Preview environments can now use their own per-service compute sizes. Set the preview size from the dashboard before opening a preview deploy, so heavier services can get enough CPU and memory without scaling the base environment.
- Preview volume clones can now run a reset command when they are created, so copied volumes can be prepared for preview testing before services start.
- We shipped a round of deploy reliability improvements. Deployment history is easier to scan in the dashboard, unchanged volume-backed services avoid unnecessary redeploys, out-of-memory deploys now show a clearer error, and failed preview redeploys can be retried from the dashboard.




