- Create `unshackle/core/providers/` package with abstract base class, IMDBApi (free, no key), SIMKL, and TMDB provider implementations
- Add consensus-based ID enrichment: cross-references IMDB IDs with TMDB and SIMKL, drops all data from providers that disagree on tmdb_id (likely resolved to wrong title)
- Cache enriched IDs alongside raw provider data so they survive cache round-trips
- Genericize TitleCacher with `cache_provider()`/`get_cached_provider()` replacing provider-specific methods; respect `--no-cache` flag
- Add `--imdb` CLI flag to dl command for direct IMDB ID lookup
N_m3u8DL-RE uses Math.Ceiling to calculate segment counts from SegmentTemplate @duration, which overshoots by 1 when the division has a small fractional remainder. This causes 404 on the phantom last segment and fails with "Segment count check not pass".
Upstream bug: nilaoda/N_m3u8DL-RE#108
Add TrackRequest dataclass to Service base class that centralizes CLI vcodec/range/best_available params. Services read from self.track_request instead of accessing ctx.parent.params directly.
- Add TrackRequest dataclass with codecs, ranges, best_available fields
- Set self.track_request in Service.__init__() from CLI params
- Add _get_tracks_for_variants() helper for per-codec/range API calls
- Update dl.py to detect migrated vs legacy services automatically
- Handle HYBRID+other ranges (e.g. -r HYBRID,SDR) correctly in dl.py
- Support --best-available with multi-range/codec (skip unavailable)
The collision-avoidance logic was preventing overwrites of files from previous runs.
Also switch subtitles with OnSegmentFilter from n_m3u8dl_re to the requests downloader so segment filtering works at download time.
HYBRID mode previously required a plain HDR10 track, rejecting HDR10+ (HDR10P) even though it's a perfectly valid (and superior) base layer.
HDR10+ is now preferred over HDR10 when both are available, preserving dynamic metadata in the final DV Profile 8 output.
