fix: release TypeType 1.2.4

[Priveetee]

Summary

• prepare the TypeType 1.2.4 SABR startup hotpatch
• advance Server to the reviewed 1.2.4 main revision
• keep Frontend, Player, Downloader, Token and documentation on their TypeType 1.2.3 revisions

Production behavior

• resumed VOD playback no longer stays in an endless SABR preparation loop
• completed livestream recordings use the VOD path during startup and quality changes
• unavailable initialization data produces a bounded recoverable failure
• normal seeks and quality changes preserve the requested playback position
• no database schema or environment value changes

Deployment requirements

• no database migration is required
• no environment change is required
• Server is available for AMD64 and ARM64 at ghcr.io/typetype-video/typetype-server@sha256:312d4507346afc9b8accf42bb5e06ad65487b1a90085988e6937c9f4acc0c0e5

Runtime verification

• beta served Server revision 07bd1cfae94815980df77264013f9b8bce2085ed
• the final format-change classification is covered by the Server test suite
• initial playback and replacement sessions preserve VOD classification for historical livestreams

Tests

• Server test
• Server check, including OpenAPI and JaCoCo
• Server shadowJar
• stack validation
• git diff --check

Rollback

• restore Server sha256:4cb61c09bd31f156e51e1eabdc71cb197ad7290f99b81f895423369dbd1a92b5
• keep TypeType 1.2.3 available as the previous stable release