Force instant python log flushing with PYTHONUNBUFFERED=1

Dockerfile

@@ -1,5 +1,8 @@
 FROM python:3.10-slim
 
+# Force python stdout to print immediately to console logs
+ENV PYTHONUNBUFFERED=1
+
 # Install system dependencies (C++ compiler, OpenCV, FFmpeg)
 RUN apt-get update && apt-get install -y \
     build-essential \
@@ -21,7 +24,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY . .
 
 # Compile C++ Enhancer
-RUN g++ -O3 enhancer.cpp -o enhancer $(pkg-config --cflags --libs opencv4)
+RUN g++ -O3 -pthread enhancer.cpp -o enhancer $(pkg-config --cflags --libs opencv4)
 
 # Expose port (Hugging Face Spaces runs on port 7860 by default)
 EXPOSE 7860