[TAGGED_PROCESSORS] Noowwwww with UI!!!!
processing policies --> processors
purge_ui: lets let fieldsets stay closed but open after dialog reloads or when they need attention.
LateRuntimeProcessor needed StringTranslationTrait of course.
Let's let http purger fail less visibly
Purger\Service didn't even work like this
Null purger and whitespace
purge_processor_lateruntime schema fix
[TAGGED_PROCESSORS] Basic testsuite for tagged processors.
[TAGGED_PROCESSORS] Basic working API implementation, highly similar to how queuers work.
[TAGGED_PROCESSORS] purge_policy_runtime-->purge_processor_lateruntime + implementation of the upcoming tagged processor subapi.
Queuer\ServiceInterface ::getAvailable() --> ::getDisabled()
Tests\Queuer\ServiceTest - 100% coverage
Queuer\QueuerInterface getId & setId
modules/purge_queuer_test: three useless queuers.
Queuer\Service's iterator implementation gave the same id each iteration, fixed
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