feat: return completed handoffs to Agent Chat (#14408)

Return completed Agent Chat handoffs through a durable outbox and scope each generated update to its supplied tasks. Add recovery, browser delivery, result access, and calibrated quality coverage.

Validated with two consecutive ten-case Claude/Codex campaigns, all CI checks, and a 5/5 review.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/modules/wake-queue/adapters/postgres.ts

@@ -1,4 +1,5 @@
 import { isAcknowledgedNativeReassignmentStop, isAcknowledgedNativeStop } from "../../../services/acknowledged-native-stop.js";
+import { isCompletedOnboardingHandoffWake } from "../../../services/chat-completion-delivery.js";
 import { instanceSettingsService } from "../../../services/instance-settings.js";
 import { currentConversationCommentCondition } from "../../../services/agent-conversations.js";
 import { getExecutionBlocker } from "../../../services/execution-blocker.js";
@@ -413,6 +414,10 @@ function buildTransaction(tx: Db, deps: WakeQueuePostgresAdapterDeps, db: Db, ru
       });
     },
 
+    async isCompletedOnboardingHandoffWake(input) {
+      return isCompletedOnboardingHandoffWake(tx, input);
+    },
+
     async reopenIssue({ companyId, issueId }) {
       const updated = await issuesSvc.updateForCompany(issueId, companyId, { status: "todo", executionState: null }, tx);
       return updated ? toIssueSnapshot(updated as unknown as IssueRow) : null;