feat: add Qobuz playlist caching with versioning and infinite scroll UI

- Add qobuz_debug to .gitignore
- Bump PMOMusic version to 0.3.26
- Add .cargo/ copy in Dockerfile for registry config
- Implement infinite scroll in ServerDrawer.vue with IntersectionObserver and sentinel element
- Add source/source_version fields to playlists for cache invalidation
- Update pmocache and pmoplaylist DB schemas with versioning (SCHEMA_VERSION)
- Add Qobuz API metadata fetching and pagination for playlist tracks
- Implement album/playlist cache invalidation based on released_at/updated_at timestamps
- Refactor adapt_playlist_items_to_qobuz → adapt_items_to_qobuz with cleaner logic
- Add debug mode to save Qobuz API responses when QOBUZ_DEBUG_DIR is set

Dockerfile

@@ -32,8 +32,9 @@ RUN apt-get update && apt-get install -y \
     cmake \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy Cargo workspace files
+# Copy Cargo workspace files and registry configuration
 COPY Cargo.toml Cargo.lock ./
+COPY .cargo/ ./.cargo/
 
 # Copy all crates
 COPY PMOMusic/ ./PMOMusic/