Synthea fails to run on JDK 25

[dehall]

What happened?

JDK 25 is the latest LTS version of java, released a couple months ago. Unfortunately the Gradle compatibility matrix means that there's no version of Gradle that works with both JDK 11 (our currently listed requirement) and JDK 25. https://docs.gradle.org/current/userguide/compatibility.html - everything prior to JDK 17 was only supported through Gradle 8.x and and JDK 25 requires Gradle 9.1+
Because JDK 11 is so far out of primary support (2 years, per https://endoflife.date/oracle-jdk ) I think we should consider dropping support for 11 in favor of 25, and make JDK 17 our new minimum requirement

Environment

- OS:
- Java:

Relevant log output

[jawalonoski]

I'm okay with phasing out Java 11 and moving to Java 17 as our minimum.

We'll need to make sure we do a version change though since we'll be breaking backwards compatibility.

@hadleynet Do you concur?

[hadleynet]

Agreed. Major or minor version increment? Seems like a major version to me if a JDK 11 user will have to update their environment.

[jawalonoski]

Yeah, probably a major version change just to be on the safe side.