New API:
- DELETE /api/private/score/{score_id}: delete a score
- POST /api/private/beatmapsets/{beatmapset_id}/sync: request for syncing a beatmapset
New configuration:
- OLD_SCORE_PROCESSING_MODE
* feat(relationship): support legacy-compatible response format
* feat(score): add support for legacy score response format in API
* fix(score): avoid missing greenlet
* fix(score): fix missing field for model validation
* feat(user): apply legacy score format for user
* feat(api): use `int` to hint `APIVersion`
Introduces asset proxy configuration and services to enable replacement of osu! resource URLs with custom domains. Updates API endpoints and caching services to process and rewrite resource URLs when asset proxy is enabled. Adds documentation and environment variables for asset proxy setup.
