feat: implement livemeta/pull API and station mapping

- Replace old /api/live endpoint with new livemeta/pull API (api.radiofrance.fr)
- Add hardcoded station ID/stream mappings with runtime-updatable mapping
- Implement station rediscovery on unknown slug or stream failure
- Add persistent caching for station mappings (30-day TTL) via pmoconfig
- Update live_metadata to use numeric IDs and handle ID mismatches
- Add station validation (API + stream accessibility check)
- Refactor metadata caching with fetched_at and fallback TTL
- Update discover_local_radios to scrape SvelteKit page data
- Add new models: PullResponse, PullStep, EmbedImage for livemeta format
- Improve live_metadata.rs example to safely truncate intros
- Enable parallel DIDL generation for playlist groups

.gitignore

@@ -16,13 +16,14 @@
 **/*.mp4
 **/*.mp3
 **/*.ogg
+
 xxx
 /dcai/
 **/.pmomusic.yml
 **/.pmomusic_covers/**
 **/.pmomusic_audio/**
 /.pmomusic
-.DS_Store
+**/.DS_Store
 /target
 **/target/
 /.pmomusic_covers