Add robust migrations for zp_entity_relationship table fix

Introduces migrations 30410, 30412, and 30413 to handle all possible database states for the zp_entity_relationship table, ensuring correct table name, schema, and indexes. Refactors migration logic into reusable helper methods for idempotency and reliability. Updates app and database version numbers to reflect these changes.

Author: marcelfolaron

app/Core/Configuration/AppSettings.php

@@ -7,7 +7,7 @@
  */
 class AppSettings
 {
-    public string $appVersion = '3.6.1';
+    public string $appVersion = '3.6.2';
 
-    public string $dbVersion = '3.4.12';
+    public string $dbVersion = '3.4.13';
 }