Ether 0.2.54

This release adds configurable same-quality alternative releases to Plex's
Play Version menu and eliminates cold account-list waiting during speculative
background checks on TorBox and Debrid-Link.

Plex Play Versions

• Offer same-quality alternative releases after Auto: detail pages now list
  other ranked releases sharing the automatic pick's cut, resolution, and HDR
  type right after Auto in Plex's Play Version menu, labelled by quality,
  audio, size, and release group (for example
  1080p WEB-DL · DD+ 5.1 · 2.3 GB · FLUX) so viewers can switch releases if
  one fails (#176).
• Configurable alternative count (0 to 3, default 1): owners can set
  Same-quality versions to offer (resolver.sameQualityAlternatives) under
  Releases → Release selection in the admin console, raising the shared
  Play Version picker cap (core.MaxVariants) from 4 to 7 while preserving
  distinct quality tiers and cuts (#176).

Debrid and Resolver

• Non-blocking cold account lists in background checks: speculative
  background checks on TorBox and Debrid-Link now consult known torrent IDs or
  a fresh one-minute account snapshot and start a single shared read-only
  refresh in the background without blocking, allowing foreground playback to
  proceed immediately while sharing the in-flight snapshot for duplicate
  recovery (#177).