Handle case when request specifies external reader with null arguments

Don't use the system Java on Windows builds, instead download them from Adoptium.

Also:

* Fail job if curl returns a 4xx status code
* Add java version to `GradleJob`

Format numbers with `.` decimals

Graal Native Image is assuming 4k page size here, which is a naughty assumption to make in the modern Linux-on-ARM landscape.
Two very common hardware configurations require 16k minumum page size: the Raspberry Pi 5 and Asahi Linux (running on Apple Silicon hardware).

This change forces 64k pages for Linux/AArch64 native executables to guarantee compatibility with these platforms.
DEVELOPMENT.adoc is also updated to cover the additional dependencies required for building native executables on Linux.

* Update license header file spec to use placeholder year
* Update spotless to use ratchet formatting (only format files that have changed)