[SM-823] ApiKey table follow up (#3183)

* dbo_future -> dbo

* DbScripts_future -> DbScripts

* Remove deprecated property

* Move data_migration -> DbScripts

util/Migrator/DbScripts/2023-08-10_00_ClientSecretHashDataMigration.sql

@@ -0,0 +1,42 @@
+/*
+This is the data migration script for the client secret hash updates.
+The initial migration util/Migrator/DbScripts/2023-05-16_00_ClientSecretHash.sql should be run prior.
+The final migration is in util/Migrator/DbScripts/2023-08-10_01_RemoveClientSecret
+*/
+IF COL_LENGTH('[dbo].[ApiKey]', 'ClientSecretHash') IS NOT NULL AND COL_LENGTH('[dbo].[ApiKey]', 'ClientSecret')  IS NOT NULL
+BEGIN
+
+  -- Add index
+  IF NOT EXISTS(SELECT name FROM sys.indexes WHERE name = 'IX_ApiKey_ClientSecretHash')
+  BEGIN
+   CREATE NONCLUSTERED INDEX [IX_ApiKey_ClientSecretHash]
+   ON [dbo].[ApiKey]([ClientSecretHash] ASC)
+   WITH (ONLINE = ON)
+  END
+
+  -- Data Migration
+  DECLARE @BatchSize INT = 10000
+  WHILE @BatchSize > 0
+  BEGIN
+    BEGIN TRANSACTION Migrate_ClientSecretHash
+
+    UPDATE TOP(@BatchSize) [dbo].[ApiKey]
+    SET ClientSecretHash = (
+        SELECT CAST(N'' AS XML).value('xs:base64Binary(sql:column("HASH"))', 'VARCHAR(128)')
+        FROM (
+            SELECT HASHBYTES('SHA2_256', [ClientSecret]) AS HASH
+            ) SRC
+        )
+    WHERE [ClientSecretHash] IS NULL
+
+    SET @BatchSize = @@ROWCOUNT
+
+    COMMIT TRANSACTION Migrate_ClientSecretHash
+  END
+
+  -- Drop index
+  DROP INDEX IF EXISTS [IX_ApiKey_ClientSecretHash]
+      ON [dbo].[ApiKey];
+
+END
+GO