[PM-23229] Add extra validation to kdf changes + authentication data + unlock data (#6121)

* Added MasterPasswordUnlock to UserDecryptionOptions as part of identity response

* Implement support for authentication data and unlock data in kdf change

* Extract to kdf command and add tests

* Fix namespace

* Delete empty file

* Fix build

* Clean up tests

* Fix tests

* Add comments

* Cleanup

* Cleanup

* Cleanup

* Clean-up and fix build

* Address feedback; force new parameters on KDF change request

* Clean-up and add tests

* Re-add logger

* Update logger to interface

* Clean up, remove Kdf Request Model

* Remove kdf request model tests

* Fix types in test

* Address feedback to rename request model and re-add tests

* Fix namespace

* Move comments

* Rename InnerKdfRequestModel to KdfRequestModel

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Co-authored-by: Maciej Zieniuk <mzieniuk@bitwarden.com>

src/Core/Entities/User.cs

@@ -78,6 +78,11 @@ public class User : ITableObject<Guid>, IStorableSubscriber, IRevisable, ITwoFac
     public DateTime? LastEmailChangeDate { get; set; }
     public bool VerifyDevices { get; set; } = true;
 
+    public string GetMasterPasswordSalt()
+    {
+        return Email.ToLowerInvariant().Trim();
+    }
+
     public void SetNewId()
     {
         Id = CoreHelpers.GenerateComb();