[PHP] SVG imagick support.

[Internal] Bugs reported with an encoded backend send unsupported NUL bytes.
[Internal] Code rot in various routines.
[Metrics] Missing TimescaleDB v2 hook at RPM update.
[phpMyAdmin] Invalid client password throws unhandled exception.
[Transfer] Reapplying a completed migration checks old UUID value.

[Bootstrapper] php/install-pecl-module renamed to php/install-extension.
[git] Trust ApisCP code root for git v2.39+.
[MySQL] Use MariaDB versioning instead of MySQL equivalence.
[PostgreSQL] v15 compatibility. Assigning permissions to a database requires explicit grants on "public" schema.
[Web Apps] Fallback to system PHP binary when multiPHP unavailable.