In "!VoiceText.txt" written some variant of filenames of sound files, but attached files has another.
E.G. string 100 in "!VoiceText.txt": "156157" => "Cleave", but "cleave.ogg" in files.
And i see "DBM-VPDemo/156157.ogg → DBM-VPDemo/cleave.ogg File renamed without changes." in one of lastest commits.
Which variant is right?

Use cleave.ogg, the file list hasn't been updated yet, I will get onto that. See the wiki page on the DBM-Retail for migration scripts for audio if you're upgrading.