Add --real-video-bitrate/-rvb and --real-audio-bitrate/-rab to measure a track's true bitrate from actual media size instead of the manifest's declared value, which is often inflated. Useful for accurate track listings and --vbitrate/--vbitrate-range selection.
Single-file tracks are measured exactly; segmented HLS/DASH/ISM are sampled. Only the top renditions per quality tier are probed, in parallel, so it stays fast. Without the flags, behaviour is unchanged.
Adds optional `audio.codec_priority` list in unshackle.yaml to define preferred audio codec order when tracks share the same bitrate and language. Listed codecs rank in the order given; unlisted codecs retain bitrate-based order and fall after the listed group (soft priority - nothing dropped). Atmos and descriptive rules still apply last.
- Wire --no-proxy-download through download_manager + handlers + swagger
- Add tag/proxy/tmdb_id/animeapi_id/enrich/worst to DEFAULT_DOWNLOAD_PARAMS
- Normalize `slow` (bool/"MIN-MAX" string/list) to tuple before invoking dl.result
- Overlay any /api/download flag declared under `serve:` in unshackle.yaml as a default (downloads, workers, best_available, etc.); request body still wins
- Quiet successful worker stderr from `warning` to `debug` (kept under job.worker_stderr for ?full=true)
- Include HYBRID in range validator
- Document new flags + overlay layering + max_concurrent_downloads / download_job_retention_hours
