fix(k1): restore low-latency live recovery path

tests/test_viewer_diagnostics_api.py

@@ -87,6 +87,12 @@ def test_private_scanner_diagnostics_are_durable_structured_and_bounded(
             "camera_queue_bytes": 12_000_000,
             "camera_queue_segments": 96,
             "camera_retry_count": 3,
+            "camera_pcl_admission_ms": 184,
+            "camera_authority_wait_ms": 91,
+            "camera_ffmpeg_prepare_ms": 42,
+            "camera_post_spawn_commit_ms": 7,
+            "camera_activation_total_ms": 140,
+            "device_command_sent": False,
             "websocket_close_code": 4_008,
             "transport_epoch": 7,
             "unapproved_secret_field": "must-not-be-written",
@@ -108,6 +114,12 @@ def test_private_scanner_diagnostics_are_durable_structured_and_bounded(
     assert document["mqtt_loop_result_code"] == 7
     assert document["mqtt_loop_phase"] == "post-publish-drain"
     assert document["automatic_retry"] is False
+    assert document["camera_pcl_admission_ms"] == 184
+    assert document["camera_authority_wait_ms"] == 91
+    assert document["camera_ffmpeg_prepare_ms"] == 42
+    assert document["camera_post_spawn_commit_ms"] == 7
+    assert document["camera_activation_total_ms"] == 140
+    assert document["device_command_sent"] is False
     assert document["side_effect_status"] == "unknown"
     assert document["network_change_attempted"] is True
     assert document["device_write_attempted"] is True