- Added avatar_url, avatar_source, avatar_fetched_at columns to Creator
model with Alembic migration 014
- New backend/services/avatar.py — TheAudioDB lookup with token-based
name similarity scoring and genre overlap bonus
- New Celery task fetch_creator_avatar for background avatar fetching
- Admin endpoints: POST /creators/{id}/fetch-avatar (single) and
POST /creators/fetch-all-avatars (batch for missing avatars)
- Wired avatar_url into CreatorRead, CreatorInfo, and CreatorBrowseItem
schemas so all API responses include avatar data
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