Linthra 0.1.0-alpha.34 — build & packaging maintenance.

Changed:
- The Android release and debug CI builds are now pinned to Temurin JDK 17, so
  the published APK/AAB matches the JDK F-Droid's build servers use. No app
  features, permissions, or behavior change.

Still an alpha — expect rough edges. Not on F-Droid yet.
