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/application/ports.ts

@@ -167,6 +167,9 @@ export interface WakeQueueTransaction {
     commentIds: string[];
   }): Promise<boolean>;
   reopenIssue(input: { companyId: string; issueId: string; runId: string }): Promise<IssueSnapshot | null>;
+  /** Verifies a Done onboarding parent's completion wake against its own completed children. */
+  isCompletedOnboardingHandoffWake(input: { companyId: string; issueId: string; agentId: string;
+    reason: string | null; contextSnapshot: Record<string, unknown> }): Promise<boolean>;
   /**
    * Atomically claims the wake for promotion, guarded on its current
    * `deferred_issue_execution` status. Call this before any other write in