Updater is a pure static procedural class — all eight public methods (checkForUpdate, download, unzip, copyFiles, deleteFiles, cleanStaleFiles, migrateUpdate, finishUpdate) are static, there's no constructor, no DI, no instance state. It's stateless self-update plumbing, same character as the Setup/ helpers that moved to Support/ in commit 6d1816bd.
Moving it out of Services/ leaves Services/ exclusively for DI-injected classes with real business logic, which is the contract the reorg was aiming for. Update/ now lives next to Setup/ in Support/ where the other install/upgrade-time utilities live.
Only 3 consumers needed touching: UpdateController, UpdateCommand, and a reference in config/invoiceshelf.php's comment. 350 tests still pass.
- Add manifest.json generation script (scripts/generate-manifest.php)
- Add Updater::cleanStaleFiles() that removes files not in manifest
- Add /api/v1/update/clean endpoint with backward compatibility
- Add configurable update_protected_paths in config/invoiceshelf.php
- Update frontend to use clean step instead of delete step
- Add GitHub Actions release workflow triggered on version tags
- Add .github/release.yml for auto-generated changelog categories
- Update Makefile to include manifest generation and scripts directory
