fix(contracts): add release.resolved event consumed across W2-B/W2-C

Plan §5 has W2-B emit and W2-C consume `release.resolved`, but EventType /
EVENT_PAYLOADS lacked it, so the two parallel subtasks would each invent a
payload. Minimal payload: sourceReleaseId, observationId, mediaEntityId,
contentUnitIds, evidenceLevel (contracts EvidenceLevel).

Co-Authored-By: Claude Fable 5.1 <[email protected]>

packages/contracts/src/events.ts

@@ -1,6 +1,7 @@
 import { z } from "zod";
 import { AgentRunStatus, DecisionKind, DecisionStatus, Severity } from "./agent.ts";
 import { Id, NonNegInt, Timestamp } from "./common.ts";
+import { EvidenceLevel } from "./identity.ts";
 import { DownloadStatus, PauseReason, TaskKind, TaskStatus } from "./execution.ts";
 import { OrganizationStatus } from "./organization.ts";
 import { FeedHealth } from "./sources.ts";
@@ -41,6 +42,8 @@ export const EventType = {
   feedFetched: "feed.fetched",
   feedHealthChanged: "feed.health_changed",
 
+  releaseResolved: "release.resolved",
+
   decisionCreated: "decision.created",
   decisionUpdated: "decision.updated",
 } as const;
@@ -136,6 +139,15 @@ export const FeedHealthChangedPayload = z.object({
   reason: z.string().nullable(),
 });
 
+/** 来源发布已识别到本地作品(W2-B 发出,W2-C 的 evaluateAcquisition 消费);歧义/无匹配走 decision.created */
+export const ReleaseResolvedPayload = z.object({
+  sourceReleaseId: Id,
+  observationId: Id.nullable(),
+  mediaEntityId: Id,
+  contentUnitIds: z.array(Id),
+  evidenceLevel: EvidenceLevel,
+});
+
 export const DecisionCreatedPayload = z.object({
   decisionId: Id,
   kind: DecisionKind,
@@ -163,6 +175,7 @@ export const EVENT_PAYLOADS = {
   "agent.tool_call": AgentToolCallPayload,
   "feed.fetched": FeedFetchedPayload,
   "feed.health_changed": FeedHealthChangedPayload,
+  "release.resolved": ReleaseResolvedPayload,
   "decision.created": DecisionCreatedPayload,
   "decision.updated": DecisionUpdatedPayload,
 } as const satisfies Record<EventType, z.ZodType>;