test(voice): wait for async streaming asr push

tests/test_ai_voice_media_runtime.py

@@ -1610,6 +1610,10 @@ def test_media_runtime_streaming_sidecar_push_does_not_block_vad_finalization():
         elapsed = time.monotonic() - started
         pcm_bytes, _ = await asyncio.wait_for(actor.turn_queue.get(), timeout=0.1)
         assert pcm_bytes
+        for _ in range(50):
+            if streaming_provider.push_count >= 1:
+                break
+            await asyncio.sleep(0.01)
         await runtime._close_streaming_asr(actor, drain=False)
         return elapsed