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/api.ts

@@ -4,7 +4,7 @@ import * as assets from "./assets.ts";
 import * as auth from "./auth.ts";
 import * as browser from "./browser.ts";
 import * as cache from "./cache.ts";
-import { WebSearchTestInput, WebSearchTestResult } from "./capabilities-io.ts";
+import { MetadataEnrichOutput, WebSearchTestInput, WebSearchTestResult } from "./capabilities-io.ts";
 import { CapabilityDescriptor, KnownCapabilityId } from "./capability.ts";
 import { type ApiScope, CursorQuery, cursorPage, HealthStatus, Id, IdParam } from "./common.ts";
 import * as content from "./content.ts";
@@ -2099,6 +2099,26 @@ export const Api = {
       params: IdParam,
       response: TaskAccepted,
     }),
+    // META-1 元数据补全:先看建议(metadata.enrich,不改作品),再在控制台应用
+    enrich: ep({
+      method: "post",
+      path: "/identity-pool/{id}/enrich",
+      scope: "organize.execute",
+      summary: "元数据补全建议（网页搜索 + 白名单网页 + 模型抽取；不改作品；同一标题 7 天内返回上次结果）",
+      params: IdParam,
+      body: identity.EnrichRequest,
+      response: MetadataEnrichOutput,
+    }),
+    enrichApply: ep({
+      method: "post",
+      path: "/identity-pool/{id}/enrich/apply",
+      scope: "admin",
+      auth: "session",
+      summary: "应用元数据补全建议：建本地临时作品（或并入同名作品）并关联待识别资源（只接受控制台管理员会话）",
+      params: IdParam,
+      body: identity.EnrichApplyInput,
+      response: identity.EnrichApplyResult,
+    }),
   },
 
   // ── 媒体库 / 库存 / 首页 ──