fix: publication removal from filesystem needed safeguard in case of non-existing UUID folder (scenario: DB migration into new JSON, but EPUB had been removed from new data format already)
fix: publication removal from filesystem needed safeguard in case of non-existing UUID folder (scenario: DB migration into new JSON, but EPUB had been removed from new data format already)

edrlab/readium-desktop,edrlab/readium-desktop,edrlab/readium-desktop