feat: add cli command to test the blobstore

Signed-off-by: Julian Koberg <julian.koberg@kiteworks.com>
(cherry picked from commit 1d2c329e66db9a406370554d91ce3951ec537ace)
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f