feat(server): W4-A integration endpoints and contract gaps

- POST /acquisition-plans: manual submit via download.plan -> download.submit
  (same authorization/audit/idempotency path as the agent), slotId or entityId
- read-only /media-assets, /asset-locations, /asset-unit-coverage, /path-bindings,
  /reconcile-runs, /server-mappings, /artifacts, GET /title-aliases/{id};
  unimplemented write endpoints removed from api.ts; registry test now checks both directions
- candidate evaluation upsert per (slot, source_release) + migration 0022 dedupe/unique index
- organization records expose downloadTaskId (+ list filter); inventory adds
  subscribed/candidateReasons; feed sources expose derived possibleGap
- GET /events?after=&limit= JSON replay page for API key callers (same sse_event table)
- preference tag revision history from audit_event; subscriptions/identities/aliases
  lists carry mediaEntityTitle; subscription q/mediaKind search; slot subscriptionId
  filter + currentAsset summary; policy preview samples carry title/reasons
- DecisionSummary, IdentityRevisionList, ReleaseIdentityResult, PolicyPreviewSummary exported from contracts

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

packages/contracts/src/organization.ts

@@ -201,6 +201,8 @@ export const PublicOrganizationRecord = z.object({
   /** 稳定记录 ID */
   id: Id,
   taskId: Id.nullable(),
+  /** 来源下载任务(手动整理本地路径时为 null) */
+  downloadTaskId: Id.nullable(),
   /** 相关资产操作账本 ID */
   operationIds: z.array(Id),
   media: z
@@ -265,6 +267,7 @@ export const OrganizationListQuery = z.object({
   status: OrganizationStatus.optional(),
   trigger: OrganizationTrigger.optional(),
   mediaEntityId: Id.optional(),
+  downloadTaskId: Id.optional(),
   q: z.string().max(200).optional(),
 });
 export type OrganizationListQuery = z.infer<typeof OrganizationListQuery>;
@@ -384,6 +387,24 @@ export const InventoryEntry = z.object({
   downloading: z.array(
     z.object({ downloadTaskId: Id, name: z.string(), status: DownloadStatus, progress: z.number().min(0).max(1) }),
   ),
+  /** 有生效中的订阅(active) */
+  subscribed: z.boolean(),
+  /**
+   * 候选理由:该作品各 Slot 对来源资源的最近一次评估(每个 (Slot, 资源) 一条,新→旧,最多 50 条)。
+   * 工作台按 sourceReleaseId 取当前资源"为什么选 / 不选"。
+   */
+  candidateReasons: z.array(
+    z.object({
+      slotId: Id,
+      slotName: z.string(),
+      sourceReleaseId: Id,
+      decision: CandidateEvaluation.shape.decision,
+      /** 拒绝原因 message + 评估说明,已合并去重 */
+      reasons: z.array(z.string()),
+      planId: Id.nullable(),
+      evaluatedAt: Timestamp,
+    }),
+  ),
 });
 export type InventoryEntry = z.infer<typeof InventoryEntry>;