feat: migrations lock (codeigniter4#9660)

* feat: migrations lock

* cs fix

* update phpstan baseline

* add upgrading notes

* apply suggestions from code review

Author: michalsn

app/Config/Migrations.php

@@ -47,4 +47,19 @@ class Migrations extends BaseConfig
      * - Y_m_d_His_
      */
     public string $timestampFormat = 'Y-m-d-His_';
+
+    /**
+     * --------------------------------------------------------------------------
+     * Enable/Disable Migration Lock
+     * --------------------------------------------------------------------------
+     *
+     * Locking is disabled by default.
+     *
+     * When enabled, it will prevent multiple migration processes
+     * from running at the same time by using a lock mechanism.
+     *
+     * This is useful in production environments to avoid conflicts
+     * or race conditions during concurrent deployments.
+     */
+    public bool $lock = false;
 }