CVE-2023-43637 Vault Key Partially Predetermined

Due to the implementation of "deriveVaultKey", prior to version 7.10, the generated vault key would always have the last 16 bytes predetermined to be "arfoobarfoobarfo". This issue happens because "deriveVaultKey" calls "retrieveCloudKey" which will always return "foobarfoobarfoobarfoobarfoobarfo...