v0.1.53 - Automatic Linux update helper setup

Fresh Linux installations and activated migration targets now set up the restricted Software Updates helper automatically on systemd hosts. Setup enables startup after reboot for the actual installation owner and verifies a fresh heartbeat from the running service before reporting readiness.

Matching existing helpers and their configuration are preserved. If setup needs attention, ALPR and its data stay in place and the installer prints the manual recovery command. Isolated migration review never starts an updater. The command ./alpr-community agent install remains available for older installations and recovery; hosts without systemd can keep the terminal updater or their existing service supervisor.

User Guide 3.21, installation, migration, bootstrap, update guidance, roadmap and wiki navigation cover the new behavior. Existing Windows installations continue to use Settings → Software Updates with their separate native updater service.

Download the Windows Setup.exe for graphical installation; the Update.zip is consumed by the Windows UI updater. Linux users can follow the installation guide and update guide. The standalone User Guide PDF and checksums are attached.

Validation includes the full test and security gates, Linux service and unattended startup checks with a disposable account, database integration fixtures, Docker runtime verification and native Windows runtime checks. See implementation and checks.