[Metrics] Add Diffusion Metrics (#4755)

Signed-off-by: vraiti <vraiti@redhat.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

tests/diffusion/test_diffusion_output_formatter.py

@@ -95,6 +95,7 @@ def test_formatter_preserves_single_video_audio_actions_and_metadata(
         "resolution": 512,
         "width": None,
         "height": None,
+        "num_inference_steps": 1,
     }