fix: upgrade yt-dlp to 2025.x to fix YouTube extraction

YouTube regularly breaks older yt-dlp versions. Bumped the minimum version
and added a separate Docker layer for yt-dlp so it can be upgraded without
busting the main pip cache.

Dockerfile

@@ -9,6 +9,8 @@ WORKDIR /app
 
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
+# Install yt-dlp last so it can be bumped independently without busting the cache above
+RUN pip install --no-cache-dir --upgrade "yt-dlp>=2025.1"
 
 COPY app/ ./app/
 

requirements.txt

@@ -1,7 +1,7 @@
 fastapi>=0.111
 uvicorn[standard]>=0.29
 python-multipart>=0.0.9
-yt-dlp>=2024.1
+yt-dlp>=2025.1
 pydantic>=2.0
 pydantic-settings>=2.0
 aiofiles>=23.0