[Captcha] Update migration script with Default Constraint (#1905)

util/Migrator/DbScripts/2022-02-10_00_FailedLoginCaptcha.sql

@@ -4,24 +4,10 @@ BEGIN
     ALTER TABLE
         [dbo].[User]
     ADD
-        [FailedLoginCount] INT NULL
+        [FailedLoginCount] INT NOT NULL CONSTRAINT D_User_FailedLoginCount DEFAULT 0
 END
 GO
 
-UPDATE
-    [dbo].[User]
-SET
-    [FailedLoginCount] = 0
-WHERE
-    [FailedLoginCount] IS NULL
-GO
-
-ALTER TABLE
-    [dbo].[User]
-ALTER COLUMN
-    [FailedLoginCount] INT NOT NULL
-GO
-
 -- Table: User (LastFailedLoginDate)
 IF COL_LENGTH('[dbo].[User]', 'LastFailedLoginDate') IS NULL
 BEGIN