Not sure how reliable and resilient SQLCipher is but that might (significantly?) increase the risk for a bug/corruption to occur. And the encryption certainly makes the analysis more difficult (while, at least on GNU/Linux, I don't see any advantage as the encryption key is stored unencrypted in ~/.config/Signal/config.json - not sure if other Desktop platforms support secure keystores like on Android and iOS). I briefly tried to analyze my corrupted DB but quickly gave up as I'm not familiar with SQLCipher and basically only got a generic "Error: file is not a database" error message when trying to decrypt it (and there's no plaintext header IIRC so it looks just like random data).
I also had multiple backups of the SQLCipher DB that I could successfully access manually but I was unable to use them for Signal-Desktop (not sure if this was due to some other Electron DBs/state, the stateful Signal protocol, or something else - IIRC the only hint was the "Database startup error: Error: SQLITE_NOTADB: file is not a database" message that didn't really help much).
SQLCipher has open-source communitiy edition.
As popular as it is, it's still underrated.