A build release. The clock is unchanged.

* Built with JDK 21 and build-tools 35.0.0, matching what F-Droid uses. The older
  combination crashed inside d8, and a reproducible build has to use the same
  toolchain that produced the published APK.
* A release build now refuses to run under the wrong JDK rather than producing an
  APK that F-Droid could never verify.
