fix(replay): stream sealed perception overlays

tests/test_e10_integrated_perception.py

@@ -134,14 +134,15 @@ def test_integrated_overlay_recovers_admission_from_sealed_cache_without_revalid
         ffmpeg_path=tmp_path / "ffmpeg",
     )
 
-    assert (
-        store.render(
-            "session-1",
-            application_id="nodedc_mission_core_recorded",
-            recording_id=recording_id,
-        )
-        == payload
+    artifact = store.materialize(
+        "session-1",
+        application_id="nodedc_mission_core_recorded",
+        recording_id=recording_id,
     )
+    assert artifact is not None
+    assert artifact.path == output.resolve()
+    assert artifact.byte_length == len(payload)
+    assert artifact.sha256 == hashlib.sha256(payload).hexdigest()
     admission = json.loads((cache_root / "session-1" / "admission.json").read_text())
     assert admission["result_id"] == result.name
     assert store.status("session-1", recording_id=recording_id) == {
@@ -150,6 +151,27 @@ def test_integrated_overlay_recovers_admission_from_sealed_cache_without_revalid
         "elapsed_seconds": pytest.approx(0.0, abs=0.1),
         "byte_length": len(payload),
     }
+    restarted = IntegratedPerceptionOverlayStore(
+        jobs_root=jobs_root,
+        results_root=results_root,
+        lidar_packs_root=lidar_packs_root,
+        cache_root=cache_root,
+        ffmpeg_path=tmp_path / "ffmpeg",
+    )
+    restarted_artifact = restarted.materialize(
+        "session-1",
+        application_id="nodedc_mission_core_recorded",
+        recording_id=recording_id,
+    )
+    assert restarted_artifact == artifact
+    assert (
+        restarted.render(
+            "session-1",
+            application_id="nodedc_mission_core_recorded",
+            recording_id=recording_id,
+        )
+        == payload
+    )
 
 
 def test_integrated_overlay_serializes_heavy_materialization_across_sessions(