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/contracts/src/reasons.ts

@@ -87,6 +87,14 @@ const REASONS: Record<string, ReasonText> = {
   read_only_reconcile: { text: "只读对账中，暂不提交下载" },
   rejected: { text: "下载器拒绝了这个种子" },
   source_failed: { text: "从站点取种子失败", action: "检查站点登录后重新下载" },
+  // SCR-1 刮削(作品刮削状态、逐文件结果)
+  scrape_no_files: { text: "作品没有已入库文件", action: "先整理入库" },
+  scrape_no_metadata: { text: "作品还没有元数据", action: "先刷新元数据" },
+  scrape_root_read_only: { text: "媒体库目录是只登记模式，不写文件" },
+  scrape_exists: { text: "文件已存在，按设置只补缺失" },
+  scrape_write_failed: { text: "写入媒体库目录失败", action: "检查目录权限后重新刮削" },
+  scrape_image_failed: { text: "图片没下载成功", action: "稍后重新刮削" },
+  scrape_no_work_dir: { text: "视频直接放在媒体库目录下，不写剧集和季的文件" },
 };
 
 /**