Update API version to 1.2.0 with ffmpeg support

- Version bump for ffmpeg system dependencies fix
- Audio processing now has proper ffmpeg/ffprobe support

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -95,7 +95,7 @@ def index():
     return jsonify({
         'message': 'Streaming Digit Classifier API',
         'status': 'running',
-        'version': '1.1.0',
+        'version': '1.2.0',
         'available_processors': list(processors.keys()),
         'documentation': 'Frontend at Vercel, Backend API at HF Spaces'
     })
@@ -173,7 +173,7 @@ def process_audio():
         result.update({
             'audio_duration': round(duration, 3),
             'file_size': len(audio_data),
-            'api_version': '1.1.0'
+            'api_version': '1.2.0'
         })
         
         app.logger.info(f"Processed audio with {method}: '{result['predicted_digit']}' in {result['inference_time']}s")
@@ -231,7 +231,7 @@ def process_audio_chunk():
             'segment_index': 0,
             'segment_size': len(standardized_audio),
             'is_streaming': True,
-            'api_version': '1.1.0'
+            'api_version': '1.2.0'
         })
         
         app.logger.info(f"Streaming prediction: '{result['predicted_digit']}' "
@@ -294,7 +294,7 @@ def health_check():
             'status': 'healthy',
             'timestamp': time.time(),
             'processors': processor_health,
-            'version': '1.1.0',
+            'version': '1.2.0',
             'deployment': 'huggingface-spaces'
         })