[PM-26632] - Adding Idempotent Confirm User (#6459)

* Added repo call for idempotent user confirm. PLUS TESTS!

* Code review changes

util/Migrator/DbScripts/2025-10-15_00_OrgUserConfirmById.sql

@@ -0,0 +1,28 @@
+CREATE OR ALTER PROCEDURE [dbo].[OrganizationUser_ConfirmById]
+    @Id UNIQUEIDENTIFIER,
+    @UserId UNIQUEIDENTIFIER,
+    @RevisionDate DATETIME2(7)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    DECLARE @RowCount INT;
+
+    UPDATE
+        [dbo].[OrganizationUser]
+    SET
+        [Status] = 2, -- Set to Confirmed
+        [RevisionDate] = @RevisionDate
+    WHERE
+        [Id] = @Id
+        AND [Status] = 1 -- Only update if status is Accepted
+
+    SET @RowCount = @@ROWCOUNT;
+
+    IF @RowCount > 0
+    BEGIN
+        EXEC [dbo].[User_BumpAccountRevisionDate] @UserId
+    END
+
+    SELECT @RowCount;
+END