feat(identity): web metadata enrichment for titles missing on TMDB (META-1)

- metadata.enrich (propose, low, replay safe): normalized-title cache (kv_cache
  region enrich, 7 days) -> daily budget -> web.search (title + 短剧 / 电视剧 平台,
  second query limited to whitelist via site:) -> web.fetch of up to 3 relevant
  whitelisted pages (registered site domains never read, redirects out of the
  whitelist dropped) -> upstream model extraction with rule fallback -> server-side
  evidence check (rule_confirmed / multi_evidence / needs_review). Suggestion only.
- POST /identity-pool/{id}/enrich (suggest) and /enrich/apply (console session):
  provisional entity or same-title merge, season/episode units, field-level
  metadata with source web/agent + evidence, aliases, release assignment.
  Poster proxy GET /img/enrich/{id} (og:image from whitelisted pages only).
- Auto-enrich once per pool entry when subscription/rule lookups find nothing on
  TMDB (identity.autoEnrich, off by default); identity.enrichDailyBudget,
  identity.enrichDomains settings; web.fetch now returns og:image.
- Pool sheet "元数据补全" section; entity detail shows evidence links.
- Migration 0049_enrichment (metadata_enrichment, metadata_field.evidence, source
  web). Requires image rebuild / api + worker restart to take effect.

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

packages/contracts/src/settings.ts

@@ -390,10 +390,45 @@ export type SearchSettings = z.infer<typeof SearchSettings>;
  * (识别缓存命中则 0 次);一个每小时 100 条的 RSS 约为每天 2400–7200 次 TMDB 请求,多数是站点独有的短剧 / 综艺,查不到。
  * 关闭(缺省)时只在命中订阅 / 本地作品别名、已发布的新作品收录规则前置条件通过、用户手动识别或搜索时查询。
  */
+/** 元数据补全缺省白名单:视频平台、短剧平台、百科 / 影视资料站(不含任何 PT 站) */
+export const DEFAULT_ENRICH_DOMAINS: string[] = [
+  "baike.baidu.com",
+  "douban.com",
+  "hongguoduanju.com",
+  "wikipedia.org",
+  "iqiyi.com",
+  "v.qq.com",
+  "youku.com",
+  "mgtv.com",
+  "bilibili.com",
+  "douyin.com",
+  "kuaishou.com",
+  "ixigua.com",
+  "baike.sogou.com",
+  "mydramalist.com",
+];
+
 export const IdentitySettings = z.object({
   eagerTmdbLookup: z.boolean(),
   /** 待识别池里 unmatched 条目多少天没有新证据就归档(仍可按状态筛出、可手动指定) */
   poolArchiveDays: z.number().int().min(1).max(3650),
+  /**
+   * META-1:订阅别名 / 新作品收录规则命中、TMDB 却查不到时自动尝试一次元数据补全(只出建议,不建作品)。
+   * 每次约 1–2 次网页搜索 + 最多 3 次读取网页 + 1 次模型调用。
+   */
+  autoEnrich: z.boolean(),
+  /** 元数据补全每日上限(手动 + 自动;命中 7 天标题缓存不计);0 = 停用补全 */
+  enrichDailyBudget: z.number().int().min(0).max(500),
+  /** 元数据补全只读取这些域名(含子域名)的网页:平台站点、百科类;已登记站点的域名一律不读 */
+  enrichDomains: z
+    .array(
+      z
+        .string()
+        .trim()
+        .toLowerCase()
+        .regex(/^[a-z0-9.-]+\.[a-z]{2,}$/),
+    )
+    .max(100),
 });
 export type IdentitySettings = z.infer<typeof IdentitySettings>;
 
@@ -483,7 +518,13 @@ export const DEFAULT_SETTINGS: GlobalSettings = {
     defaultDetailCacheSec: 86400,
   },
   naming: { ...DEFAULT_NAMING_TEMPLATES, lockFileNameForBound: false },
-  identity: { eagerTmdbLookup: false, poolArchiveDays: 30 },
+  identity: {
+    eagerTmdbLookup: false,
+    poolArchiveDays: 30,
+    autoEnrich: false,
+    enrichDailyBudget: 20,
+    enrichDomains: DEFAULT_ENRICH_DOMAINS,
+  },
   search: { defaultSiteMode: "default", siteIds: [] },
 };
 
@@ -738,6 +779,9 @@ export const SETTINGS_SECTIONS: readonly SettingsSectionDef[] = [
       "cache.emptyResultTtlSec",
       "identity.eagerTmdbLookup",
       "identity.poolArchiveDays",
+      "identity.autoEnrich",
+      "identity.enrichDailyBudget",
+      "identity.enrichDomains",
       "cache.globalImageCache",
       "cache.globalImageCacheDays",
     ],