Change Details

[ENG-10786](https://linear.app/comm/issue/ENG-10786/database-downloaded-from-the-backup-is-not-encrypted). Extracting code, in next diff this is used elsewhere. I also removed `sqlite3 *db` param from `isDatabaseQueryable` - I have no clue why it was needed, but after refactoring there is no point to keep it. Depends on D14793

[ENG-10786](https://linear.app/comm/issue/ENG-10786/database-downloaded-from-the-backup-is-not-encrypted). Extracting code, in the next diff, this is used elsewhere. I also removed `sqlite3 *db` param from `isDatabaseQueryable` - I have no clue why it was needed, but after refactoring, there is no point to keep it. Depends on D14793

[ENG-10786](https://linear.app/comm/issue/ENG-10786/database-downloaded-from-the-backup-is-not-encrypted). Extracting code, inin the next diff, this is used elsewhere. I also removed `sqlite3 *db` param from `isDatabaseQueryable` - I have no clue why it was needed, but after refactoring, there is no point to keep it. Depends on D14793