- Add source_width, source_height, variants_status fields to images table
- Remove thumbnail_data (now derived to disk cache)
- Add Oban tables via Oban.Migration.up(version: 12)
- Update Image schema changeset to include new fields
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Create settings table for site-wide key-value configuration
- Create images table for BLOB storage of logo/header images
- Add Setting schema with JSON/string/integer/boolean support
- Add ThemeSettings embedded schema with all theme options
- Add Settings context with get/put/update operations
- Add Media context for image uploads and retrieval
- Add Image schema with SVG detection and storage
- Add 9 curated theme presets (gallery, studio, boutique, etc.)
- Add comprehensive tests for Settings and Media contexts
- Add seeds with default Studio preset
- All tests passing (29 tests, 0 failures)
