refactor: add validation to storage, repo and session blueprints#347

Panaetius merged 5 commits intorelease-amaltheas-migrationSwissDataScienceCenter/renku-data-services:release-amaltheas-migrationfrom

refactor/304-add-validation-to-repos-sessions-storageSwissDataScienceCenter/renku-data-services:refactor/304-add-validation-to-repos-sessions-storageCopy head branch name to clipboard