- Add missing quick_notes column to restore_brews INSERT
- Add cups export/restore with CupRecord and BackupData field
- Bump backup version to 2; old v1 backups still restore via serde default
- Add `define_cli_auth_test!` macro for authentication-required tests
- Add `define_cli_list_test!` macro for unauthenticated list tests
- Replace 18 auth tests and 5 list tests with macro invocations
- Add `create_entity_cli()` generic, convert per-entity helpers to
thin wrappers
- Move `create_bag` and `create_gear` from brews_cli.rs to helpers.rs
- Add GET /api/v1/backup and POST /api/v1/backup/restore endpoints
behind AuthenticatedUser
- Add BackupService to AppState and BackupClient for HTTP access
- Update CLI backup/restore to use API instead of direct DB access
- Remove --database-url flag from backup and restore commands
- Increase body limit to 50MB for restore endpoint
- Add API and CLI tests for auth, export, restore, and round-trip
- Update README to document auth requirement and API endpoints
