🩹(all) clear the SonarCloud reliability finding and the lint debt

The SonarCloud gate fails on main, so every commit lands red, and
gh run list hides it: it lists only Actions workflows, and the
failure is an app check run.

Reliability rests on one bug, in test_file_service.py, which wrapped
an assertion in an except Exception re-raised through pytest.fail.
Removing it takes the rating from D to A.

Two pieces of debt ride along. The SDK callback id now comes from
crypto.getRandomValues, since it guards an endpoint with no auth. And
core/tasks gets the __init__.py that lets pylint see it, with the
debt that exposes, which is why #1533 fails lint-back.

src/summary/tests/unit/test_file_service.py

@@ -143,13 +143,9 @@ def test_media_info_ignores_empty_stream_entry(monkeypatch: pytest.MonkeyPatch)
 
 def test_extract_audio_from_video():
     """Test that extract_audio_from_video can extract audio from a video file."""
-    path = None
+    path = extract_audio_from_media(MEDIA_INFO_SAMPLE_VISIO)
     # A bit of cleanup logic since this is not a generator
     try:
-        path = extract_audio_from_media(MEDIA_INFO_SAMPLE_VISIO)
         assert path.name.endswith(".m4a")
-    except Exception as e:
-        pytest.fail(f"Failed to extract audio from video: {e}")
     finally:
-        if path and path.exists():
-            path.unlink()
+        path.unlink(missing_ok=True)