Cleaned up API and added caching #654

Job	Run time
Check custom theme assets are up to date	46s
Check that debug patches can be applied and reversed. (patches/openid_connect-debug-userinfo.patch)	39s
Changelog should be updated	4s
audit	23s
PHP - Code analysis	1m 34s
Assets - Check Coding Standards	8s
Markdown - Check Coding Standards	8s
PHP - Check Coding Standards	1m 25s
Twig - Check Coding Standards	1m 31s
Check that config is up to date	1m 20s
fail-for-do-not-merge	0s
Check that site can be installed	2m 9s
playwright-tests	0s
Validate composer	29s
Check that site can be updated	1m 36s
	12m 12s

Provide feedback