feat(metadata): one-shot metadata.backfill_languages maintenance job (FIX-5)

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

apps/server/src/modules/sources-identity/index.ts

@@ -9,6 +9,7 @@ import { workbenchRoutes } from "./routes/workbench.ts";
 import { type RuntimeOverrides, SourcesRuntime } from "./runtime.ts";
 import { readOnlyReconcile, tickFeeds, tickReviews, tickSnapshots } from "./scheduler.ts";
 import { tickSiteHealth, tickSiteUserData } from "./service/account.ts";
+import { BACKFILL_LANGUAGES_JOB, backfillLanguages } from "./service/backfill-languages.ts";
 import { registerSourcesTasks, sourcesOutboxRoutes } from "./tasks.ts";
 
 /**
@@ -89,6 +90,23 @@ export function createSourcesIdentityModule(overrides: RuntimeOverrides = {}): S
         },
         run: async () => ({ summary: `${await tickSiteHealth(rt)} 个站点` }),
       });
+      // FIX-5 存量元数据回刷:部署后首次启动即运行,跑完自动停用;可在计划页手动再执行
+      registerScheduledJob(ctx, {
+        key: BACKFILL_LANGUAGES_JOB,
+        defaults: {
+          name: "元数据语言回刷",
+          description:
+            "对已确认 TMDB 身份的作品按语言回退链完整刷新一次（标题、简介、每集信息），TMDB 每秒最多 2 次请求；跑完自动停用，可手动再执行",
+          group: "maintain",
+          schedule: { type: "interval", everyMs: 24 * 3_600_000 },
+          firstRun: "now",
+        },
+        run: async ({ runId, jobId }) => {
+          if (await readOnlyReconcile(rt)) return { status: "skipped", summary: "只读对账模式" };
+          const r = await backfillLanguages(rt, { runId, jobId, disableWhenDone: true });
+          return { status: r.status, summary: r.summary };
+        },
+      });
     },
   };
 }