Fix: Log SQL in Complete method instead of non-existent CreateStoreCommand

Removed the CreateStoreCommand override (doesn't exist in base class).
Added SQL logging in the Complete method which is called after all SQL
is finalized. This logs the SqlBuilder.ToString() which contains the
actual SQL command that will be executed.

This should capture the malformed SQL causing "near ', ,'" errors.

Co-authored-by: renemadsen <76994+renemadsen@users.noreply.github.com>

Author: Copilot

src/EFCore.MySql/Update/Internal/MySqlModificationCommandBatch.cs

@@ -120,6 +120,11 @@ public override void Complete(bool moreBatchesExpected)
         ApplyPendingBulkInsertCommands();
 
         base.Complete(moreBatchesExpected);
+        
+        // DEBUG: Log the complete SQL command
+        var sqlText = SqlBuilder.ToString();
+        Console.WriteLine($"[DEBUG SQL COMPLETE] SQL Text Length: {sqlText.Length}");
+        Console.WriteLine($"[DEBUG SQL COMPLETE] SQL Text: {sqlText}");
     }
 
     /// <summary>
@@ -378,12 +383,4 @@ public override bool TryAddCommand(IReadOnlyModificationCommand modificationComm
     /// We use _pendingParameters only to support our AddParameter implementation.
     /// </summary>
     private int _pendingParameters;
-
-    protected override RawSqlCommand CreateStoreCommand()
-    {
-        var command = base.CreateStoreCommand();
-        Console.WriteLine($"[DEBUG SQL COMMAND] CommandText: {command.RelationalCommand.CommandText}");
-        Console.WriteLine($"[DEBUG SQL COMMAND] ParameterCount: {command.ParameterValues.Count}");
-        return command;
-    }
 }