feat(identity): lazy TMDB lookup and bounded identity pool (DEC-1)

RSS/list releases that match no subscription or local work no longer hit
TMDB or open a pending item; they go to the identity pool as `unmatched`.
TMDB is queried only on a local alias hit, a published new-title rule whose
prefilter passes, manual/Agent retry, search results, or when the new
setting identity.eagerTmdbLookup (default off) is on. Mirrors MoviePilot:
torrents are recognised only when matched to a subscription or searched,
and recognition failures are logged, not alerted.

- Pending items only for related releases (ambiguous after lookup, or
  related to a local work but unresolved); same source + normalized title
  merge into one decision ("来源「X」的 N 条资源待识别"), resolve/dismiss
  applies to the whole group, members detach as they get resolved.
- Pool governance: unmatched reviews capped (daily, 3x), title_alias
  insert trigger wakes similar entries, stale unmatched entries archived
  after identity.poolArchiveDays (30); review idempotency keys include the
  due time.
- Migration 0047_identity_pool: reason/outcome `unmatched`,
  identity_candidate.normalized_title (+trgm index), wake trigger, and
  cleanup of open identity_unresolved items with no related work
  (dismissed, resolution=moved_to_pool).
- Inbox: group by type + work/source with collapse, hide info-only items
  by default (minSeverity=warning), badge counts warning+ only; pool sheet
  gets manual TMDB/local-work assign and dismiss; settings card for the
  new identity settings.
- Runbook docs/runbook/identity.md.

Requires rebuild/restart (migration runs on start).

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

apps/web/app/components/settings/metadata.tsx

@@ -180,6 +180,39 @@ function ImageCacheStatus() {
   );
 }
 
+// 身份识别(DEC-1 惰性识别,对照 MP:RSS / 列表资源只在匹配订阅或用户搜索时识别)
+const IDENTITY_CARD: CardSpec = {
+  anchor: "identity",
+  title: "资源识别",
+  description:
+    "缺省只在资源命中订阅或本地作品别名、新作品收录规则前置条件通过、你手动识别或搜索时查 TMDB；其余进待识别池，不进待处理。",
+  fields: [
+    {
+      name: "identity.eagerTmdbLookup",
+      label: "每条新资源都查 TMDB",
+      kind: "switch",
+      hint: "旧行为。每条资源约 1–2 次搜索 + 命中时 1 次详情（识别缓存命中为 0）；每小时 100 条的 RSS 约每天 2400–7200 次请求，站点独有的短剧 / 综艺多半查不到",
+      wide: true,
+    },
+    {
+      name: "identity.poolArchiveDays",
+      label: "待识别池归档（天）",
+      kind: "number",
+      hint: "未命中订阅的条目超过这么多天没有新证据就归档，仍可筛出并手动指定",
+    },
+  ],
+  fromSettings: (s) => ({
+    "identity.eagerTmdbLookup": s.identity.eagerTmdbLookup,
+    "identity.poolArchiveDays": n(s.identity.poolArchiveDays),
+  }),
+  toPatch: (v) => ({
+    identity: {
+      eagerTmdbLookup: v["identity.eagerTmdbLookup"] === true,
+      poolArchiveDays: Number(v["identity.poolArchiveDays"]),
+    },
+  }),
+};
+
 export function MetadataSection() {
   return (
     <SettingsGate>
@@ -187,6 +220,7 @@ export function MetadataSection() {
         <>
           <SettingsCard section="metadata" spec={TMDB_CARD} settings={s} />
           <SettingsCard section="metadata" spec={TMDB_CACHE_CARD} settings={s} />
+          <SettingsCard section="metadata" spec={IDENTITY_CARD} settings={s} />
           <SettingsCard section="metadata" spec={IMAGES_CARD} settings={s} />
         </>
       )}