5.1.0

Features

• ip-info: Consolidate IP lookup, add ipinfo.io token support
• dl: Cache content keys in-memory to skip duplicate license requests
• mux: Add muxing.default_language to override default track per type
• hls: Detect DV-composite tracks and restore signaling post-mux
• video: Normalize SPS VUI to match manifest-derived range
• api: Sync /api/download with dl CLI flags and add serve.* defaults
• vaults: Tolerate vault failures during key get/add
• tracks: Configurable audio codec priority for tie-breaking
• dl: Live countdown for --slow delay
• dl: Gate s_lang/a_lang miss behind --best-available
• dl: Add real bitrate probing (-rvb/-rab)
• import: Reconstruct downloads from an --export sidecar
• naming: Per-service title_map remapping
• import: Include cover-art attachments in --export/--import

Bug Fixes

• manifests: Clean stale .!dev resume markers before merge
• sanitize: Preserve parentheses, strip unidecode bracket artifacts
• tracks: Honor --worst in hybrid range selection
• dl: Re-pick DV/HDR10 when HYBRID falls back under best_available
• proxies/nordvpn: Use *.proxy.nordvpn.com for HTTPS proxy
• template_formatter: Preserve dash separator around empty conditional
• dl: Prefer Atmos in -l best/all language selection
• title: Detect Atmos across all audio tracks for filename template
• title: Use original-language audio for filename metadata
• service: Render request_input prompt via rich console
• titles: Normalize odd resolutions in filename quality token
• api: Propagate Click default=None through service instantiation
• api: Load real CDM for service init in list/session/download flows
• vaults: Enable WAL on SQLite vault to fix concurrent locks
• hybrid: Correct static L6 source and reset stale L5 active area
• cli: Report broken command/service loads once and cleanly
• hls: Resolve per-rendition KID in no-EXT-X-KEY fallback
• dash: Inherit SegmentTemplate attributes across AdaptationSet/Representation
• dl: Mux all requested ranges and select highest DV alongside hybrid
• session: Proxy auth on http targets and string params support

Documentation

• Update docs to match current codebase
• output: Document muxing.default_language override
• Simplify README with demo and requirements

Changes

• routes, subtitle, track: Improve code readability by formatting list structures
• hybrid: Extract dovi_tool and run_step helpers
• ip_info: Simplify lookup and trim cache
• example: Showcase full unshackle feature surface
• dl: Declare hybrid_base_only flag and extract standalone mux helper
• Remove dead aria2c and n_m3u8dl_re downloader code

Maintenance

• pre-commit: Update hook versions in .pre-commit-config.yaml