feat(server): scrapeMedia 刮削任务,入库后自动刮削(SCR-1)

- 文件道任务 scrapeMedia:NFO 原子写入、图片经图片缓存下载(并发 4,失败不阻塞 NFO)、只补缺失 / 全部覆盖
- 设置 organize.scrapeAfterImport / scrapeMode / scrapeImages / scrapeEpisodeThumbs
- POST /library/{id}/scrape、详情 scrape 状态;files/scrape writeNfo 与 scrape-batch write 走同一任务
- 迁移 0057_media_scrape、原因码、审计 organize.scrape
- 与 MP 输出的 NFO 差分测试(apps/server/test/scrape)

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/db/test/schema.test.ts

@@ -26,6 +26,7 @@ const EXPECTED_TABLES = [
   "path_mapping",
   // 内容 / 身份
   "media_entity",
+  "media_scrape",
   "content_unit",
   "title_alias",
   "external_identity",
@@ -153,6 +154,8 @@ const NON_ENTITY_TABLES = [
   "kv_cache",
   // 站点请求计数:(site_id, hour) 主键
   "site_request_count",
+  // 作品最近一次刮削:media_entity_id 主键(SCR-1)
+  "media_scrape",
 ];
 
 describe.skipIf(skip)("schema migrations (real PG)", () => {