Add isolated HeartMuLa 3B quality test

experiments/heartmula-3b/Dockerfile

@@ -0,0 +1,22 @@
+FROM pytorch/pytorch:2.9.1-cuda12.8-cudnn9-runtime
+
+ARG HEARTLIB_COMMIT=3783bdb8441f2c298b1e64c8651173aac200361c
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends git ffmpeg curl \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN git clone https://github.com/HeartMuLa/heartlib.git /opt/heartlib \
+    && git -C /opt/heartlib checkout "${HEARTLIB_COMMIT}" \
+    && pip install --no-cache-dir -e /opt/heartlib \
+    && pip install --no-cache-dir gradio==5.49.1 uvicorn==0.35.0
+
+COPY app.py /opt/app/app.py
+
+WORKDIR /opt/app
+ENV PYTHONUNBUFFERED=1 \
+    HEARTMULA_MODEL_PATH=/models/ckpt \
+    HEARTMULA_OUTPUT_DIR=/output
+
+EXPOSE 7860
+CMD ["python", "/opt/app/app.py"]