feat(FN-4296): complete Step 5 — finalize sync wiring and verification fixes

Fusion-Task-Id: FN-4296
Fusion-Task-Lineage: 9d061861-547a-4905-8fdd-4b66dd7bff97

packages/engine/src/runtimes/__tests__/in-process-runtime.test.ts

@@ -484,10 +484,10 @@ describe("InProcessRuntime", () => {
       const moveData = { task: mockTask, from: "todo", to: "in-progress" };
       
       const onCalls = (taskStore.on as ReturnType<typeof vi.fn>).mock.calls;
-      const taskMovedHandler = onCalls.find((call: unknown[]) => call[0] === "task:moved");
-      
-      if (taskMovedHandler) {
-        (taskMovedHandler[1] as (data: { task: Task; from: string; to: string }) => void)(moveData);
+      const taskMovedHandlers = onCalls.filter((call: unknown[]) => call[0] === "task:moved");
+
+      for (const handler of taskMovedHandlers) {
+        (handler[1] as (data: { task: Task; from: string; to: string }) => void)(moveData);
       }
 
       expect(taskMovedSpy).toHaveBeenCalledWith(moveData);

packages/engine/src/runtimes/in-process-runtime.ts

@@ -676,7 +676,7 @@ export class InProcessRuntime
       this.stuckTaskDetector.start();
       this.detachAgentLinkSync = attachAgentLinkSync({
         store: this.taskStore,
-        agentStore: this.agentStore,
+        agentStore: this.agentStore!,
         hasActiveAgentExecution: (agentId: string) => this.heartbeatMonitor?.getTrackedAgents().includes(agentId) ?? false,
         logger: runtimeLog,
       });