Release 2.20.0

✨ Features

• infinidysk: add guarded opt-in NzbDAV migration (c7e2d20)
• infinidysk: harden namespace migration discovery and recovery (963ff62)
• migration: harden InfiniDysk namespace cutover quiescence (4f066f8)

🐛 Bug Fixes

• ci: tolerate Go Docker image publication lag (be97f70)
• infinidysk: harden full namespace migration and rollback (ca3a5f6)
• infinidysk: harden Plex library migration timeouts (91ba33b)
• mediastorm: support amd64 jellyfin-ffmpeg OCI links (#310) (403b6fc)
• migration: harden InfiniDysk rollback and retry safety (699afa1)
• postgres: harden config writes and migration stability (a176ef3)
• updates: normalize blank release selectors to latest (4cdbf7e)

🤡 Other Changes

• deps: update dependencies (8eff664)

🛠️ Build System

• deps-dev: bump setuptools from 83.0.0 to 84.0.0 (#309) (f8fedef)