https://developer.nextmoe.dev/problems/catalog/entity-merged
实体已被合并
ENTITY_MERGED HTTP 404目录数据该实体已被合并进另一个实体。响应里带 object 与 current_id，同时回一个 Link rel=canonical。
Canonical (English)
Entity merged
The entity was merged into another. object and current_id are present, and Link rel=canonical is sent.