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- 迁移0016:content_items 加 cover/images_json/video/video_cover/link/publisher_name/publisher_avatar - ContentRepository:_to_dict/create/update 支持富字段;images(list)↔images_json;update 白名单含 publisher_id - schemas:ContentCreate/UpdateRequest 加富字段 - rbac_operator:POST /content 注入发布人(actor 昵称/头像快照);新增 POST /admin/upload(媒体上传) - app/services/media_upload.py:统一上传(serverdata/uploads + abs_url),与 /api/upload 同契约 Co-Authored-By: Claude <noreply@anthropic.com>