Fix audio transcription to use correct Groq API format

- Changed to pass file contents instead of file object
- Using (filename, file_contents) tuple format per Groq documentation
- Added temperature=0.0 parameter for consistent results

app.py

@@ -100,14 +100,15 @@ class ToolRegistry:
             if not any(filename.lower().endswith(ext) for ext in ['.wav', '.mp3', '.webm', '.m4a', '.ogg']):
                 filename = 'audio.wav'
 
-            # Create a tuple with (filename, file_object) for Groq API
-            # This ensures Groq can properly detect the audio format
-            file_tuple = (filename, audio_file)
+            # Read the file contents and create tuple as per Groq API documentation
+            # Format: (filename, file_contents)
+            file_contents = audio_file.read()
 
             transcription = groq_client.audio.transcriptions.create(
-                file=file_tuple,
+                file=(filename, file_contents),
                 model="whisper-large-v3-turbo",
-                response_format="text"
+                response_format="text",
+                temperature=0.0
             )
             return str(transcription)
         except Exception as e: