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/execution.ts

@@ -123,6 +123,31 @@ export const AcquisitionPlanCreate = AcquisitionPlan.omit({ ...SERVER_MANAGED, s
   statusReason: true,
 });
 export type AcquisitionPlanCreate = z.infer<typeof AcquisitionPlanCreate>;
+
+/**
+ * 手动提交下载(工作台下载入口,POST /acquisition-plans):与自动收录同一流程——
+ * download.plan(evaluateAcquisition,硬条件/预算/阈值/Slot 忙)→ download.submit(预留 + submitDownload 任务)。
+ * 目标 Slot:slotId 优先;否则 entityId(缺省取来源资源已识别的作品)下按创建顺序逐个尝试,第一个生成计划的 Slot 胜出。
+ */
+export const ManualAcquisitionRequest = z.object({
+  sourceReleaseId: Id,
+  slotId: Id.optional(),
+  entityId: Id.optional(),
+  note: z.string().max(2000).optional(),
+});
+export type ManualAcquisitionRequest = z.infer<typeof ManualAcquisitionRequest>;
+
+export const ManualAcquisitionResult = z.object({
+  /** true = 计划已预留并入队 submitDownload */
+  submitted: z.boolean(),
+  plan: AcquisitionPlan.nullable(),
+  slotId: Id.nullable(),
+  /** 业务任务 ID(submitDownload) */
+  taskId: Id.nullable(),
+  /** 未生成计划时逐个 Slot 的拒绝原因 */
+  rejected: z.array(z.object({ slotId: Id.nullable(), code: z.string(), message: z.string() })),
+});
+export type ManualAcquisitionResult = z.infer<typeof ManualAcquisitionResult>;
 export const AcquisitionPlanUpdate = AcquisitionPlan.pick({ status: true, taskId: true, statusReason: true }).partial();
 export type AcquisitionPlanUpdate = z.infer<typeof AcquisitionPlanUpdate>;