[PM-13706] Add repository + stored procedures for private key regeneration (#4898)

* Add stored procedure

* Add repository

util/Migrator/DbScripts/2024-11-21_00_AddUserAsymmetricKeysRegenerate.sql

@@ -0,0 +1,16 @@
+CREATE OR ALTER PROCEDURE [dbo].[UserAsymmetricKeys_Regenerate]
+    @UserId UNIQUEIDENTIFIER,
+    @PublicKey VARCHAR(MAX),
+    @PrivateKey VARCHAR(MAX)
+AS
+BEGIN
+    SET NOCOUNT ON
+    DECLARE @UtcNow DATETIME2(7) = GETUTCDATE();
+
+    UPDATE [dbo].[User]
+    SET [PublicKey] = @PublicKey,
+        [PrivateKey] = @PrivateKey,
+        [RevisionDate] = @UtcNow,
+        [AccountRevisionDate] = @UtcNow
+    WHERE [Id] = @UserId
+END