chore(02-01): add audio dependencies to Dockerfile and pyproject.toml

- Add mpv-libs, ffmpeg, ffmpeg-libs, libsndfile to Alpine Dockerfile
- Add python-mpv>=1.0.5, soundfile>=0.12.0, numpy>=1.26.0 to pyproject.toml

Dockerfile

@@ -2,6 +2,13 @@ FROM python:3.11-alpine
 
 WORKDIR /app
 
+# Audio stack: libmpv for python-mpv, ffmpeg for MP3 waveform, libsndfile for soundfile
+RUN apk add --no-cache \
+    mpv-libs \
+    ffmpeg \
+    ffmpeg-libs \
+    libsndfile
+
 COPY pyproject.toml .
 RUN pip install --no-cache-dir .
 

pyproject.toml

@@ -13,6 +13,9 @@ dependencies = [
     "aiofiles>=24.0.0",
     "python-dotenv>=1.0.0",
     "structlog>=24.0.0",
+    "python-mpv>=1.0.5",
+    "soundfile>=0.12.0",
+    "numpy>=1.26.0",
 ]
 
 [project.optional-dependencies]