BUG: 9.0 cr:prune is a noop if projections are empty already or not up to date

[mhsdesign]

... as we rely on the content stream projection being up to date which might not be the case for a dev system in error state

neos-development-collection/Neos.ContentRepository.Core/Classes/Service/ContentStreamPruner.php

Line 89 in ad1e315

$contentStreamIds = $this->contentRepository->getContentStreamFinder()->findAllIds();

maybe we need some hardcode db reset cr:prune --agressive-show-no-mercy

[mhsdesign]

Basically we just empty the tables like we do here :D

neos-development-collection/Neos.ContentRepository.LegacyNodeMigration/Classes/Command/CrCommandController.php

Lines 118 to 124 in c79e895

	$eventTableName = DoctrineEventStoreFactory::databaseTableName($contentRepositoryId);
	$confirmed = $this->output->askConfirmation(sprintf('We will clear the events from "%s". ARE YOU SURE [n]? ', $eventTableName), false);
	if (!$confirmed) {
	$this->outputLine('Cancelled...');
	$this->quit();
	}
	$this->connection->executeStatement('TRUNCATE ' . $connection->quoteIdentifier($eventTableName));