Adds a boot-time deprecation warning when running on Rails 8.2+ (which serves /.well-known/appspecific/com.chrome.devtools.json natively via Rails::DevToolsController); the gem keeps working on Rails 8.0/8.1. Raises the minimum Ruby to 3.2, fixes LICENSE packaging, and aligns CI/release tooling (CodeQL, release-drafter, OIDC trusted publishing) with the other 6temes gems.