Refactor test cases for improved readability and consistency

- Adjusted function signatures in various test files to enhance clarity by aligning parameters.
- Updated patching syntax for better readability across test cases.
- Improved formatting and spacing in test assertions and mock setups.
- Ensured consistent use of async/await patterns in async test functions.
- Enhanced comments for better understanding of test intentions.

app/services/sound_normalizer.py

@@ -140,7 +140,10 @@ class SoundNormalizerService:
             stream = ffmpeg.overwrite_output(stream)
 
             await asyncio.to_thread(
-                ffmpeg.run, stream, quiet=True, overwrite_output=True,
+                ffmpeg.run,
+                stream,
+                quiet=True,
+                overwrite_output=True,
             )
             logger.info("One-pass normalization completed: %s", output_path)
 
@@ -180,7 +183,10 @@ class SoundNormalizerService:
             # Run first pass and capture output
             try:
                 result = await asyncio.to_thread(
-                    ffmpeg.run, stream, capture_stderr=True, quiet=True,
+                    ffmpeg.run,
+                    stream,
+                    capture_stderr=True,
+                    quiet=True,
                 )
                 analysis_output = result[1].decode("utf-8")
             except ffmpeg.Error as e:
@@ -262,7 +268,10 @@ class SoundNormalizerService:
 
             try:
                 await asyncio.to_thread(
-                    ffmpeg.run, stream, quiet=True, overwrite_output=True,
+                    ffmpeg.run,
+                    stream,
+                    quiet=True,
+                    overwrite_output=True,
                 )
                 logger.info("Two-pass normalization completed: %s", output_path)
             except ffmpeg.Error as e: