test(platform-server): replace fixed timeout with polling in event replay test

This test appears to be flakey in CI, presumably because resource constrained environments can run unexpected slower and exceed the timeout. This switches to a polling approach, waiting for the queue to drain.

(cherry picked from commit b4a3abd)

Author: dgp1130

packages/platform-server/test/event_replay_spec.ts

@@ -792,11 +792,11 @@ describe('event replay', () => {
       // Eventually it should be empty again.
       // Since `invokeRegisteredReplayListeners` triggers hydration directly and pushes to queue.
 
-      // We can inspect the queue if we want.
-      // But mainly we want to ensure no crash and cleanup happens.
-
       // wait for replay
-      await new Promise((resolve) => setTimeout(resolve, 100));
+      const start = Date.now();
+      while (queue.length > 0 && Date.now() - start < 1_000) {
+        await new Promise((resolve) => setTimeout(resolve, 10));
+      }
       expect(queue.length).toBe(0);
     });