Increase DBConnection queue tolerance to stop requests being dropped
under load, and flip 3 write-heavy test files to async: false since
SQLite's single-writer model doesn't play well with concurrent writes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Move all image URL logic into ProductImage.url/2 and thumbnail_url/1,
remove dead on-demand generation code from Optimizer, strip controller
routes down to SVG recolor only, fix mockup startup check to verify all
variant formats, and isolate test image cache directory.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- enable WAL journal mode for better concurrent access
- increase busy_timeout to 10s
- reduce pool_size to 1 to prevent write conflicts
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add Oban ~> 2.18 with SQLite support (Oban.Engines.Lite) for durable
background job processing. Configure aggressive pruning (60s max_age)
to keep database lean, with a dedicated images queue.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
