Debug: Override CreateStoreCommand to log SQL commands

Added CreateStoreCommand override in MySqlModificationCommandBatch that logs:
- The actual SQL command text being executed
- Parameter count

This is the most direct way to capture the malformed SQL queries causing
the "near ', ,'" syntax errors. The method is called right before execution,
so we'll definitely see the SQL.

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

Author: Copilot

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

@@ -378,4 +378,12 @@ 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;
+    }
 }