action: manual
reason: Database schema change requires running flask db upgrade manually before restarting. Environment variable rename also needs .env update.
---
## Breaking changes

- The `PIEFED_SECRET_KEY` environment variable has been renamed to `SECRET_KEY`. Update your `.env` file before upgrading.
- New database columns have been added. Run `flask db upgrade` before restarting the application.

## Other changes

- Improved federation with Lemmy 0.19.x
- Minor UI tweaks to the community sidebar
- Updated translations for 3 languages