Release TypeType 1.9.0

[Priveetee]

Summary

• Bring the Server, Frontend, Token, Downloader, Docs, and Player revisions together for TypeType 1.9.0.
• Add the complete 1.9.0 release notes, including AI Transparency, playback reliability, subscription groups, Takeout, self-hosting, and contributor credits.
• Preserve stable deployment rollback snapshots by default; do not prune them automatically.

Production behavior

YouTube web playback uses SABR-only delivery, with recoverable live requests requeued in the active playback session. BiliBili and NicoNico playback remain on their existing provider paths. The release also improves desktop subscription-group management and channel-avatar loading.

Deployment requirements

• Compose bootstrapping creates BILIBILI_SESSION_ENCRYPTION_KEY when it is absent.
• Stable deployment now retains previous rollback snapshots. Remove them only after storage has been checked and space is actually required.
• Verify the production health path and playback at watch.eltux.fr after rollout.

Component revisions

• Docs: 0396e3e65a966381442d3c0f4cc4b96ec7cbded3
• Downloader: d66b41466eff2cf3ad44c5d723bcee3372b83d3a
• Frontend: 91e8708f927e8b4355bbaeb9b0833872c6210930
• Player: 4b533516ee3692bffe2005113bc2d904be4e5441
• Server: 49e33daab748cd8aaaf944c8006d6413d1fbd40a
• Token: d7e34da66afdbefa8560b21542d8f2fcca59ebfc

Player PR #37 has been merged, and the release branch pins its merge commit.

Runtime verification

• ./scripts/validate-stack.sh passed on Stack.
• ./scripts/deploy-stable.test.sh passed, confirming a successful simulated deployment preserves six existing snapshots and creates a new one.
• Production deployment and runtime verification have not yet been performed.

Rollback

The stable deployment snapshot retains the prior environment, managed stack files, image references, and database dumps. Rollback can restore those files and image references without pruning older snapshots.