fix: ensure table options are set to null if not defined in tree and multiple_tree migrations.

Author: terabytesoftw

migrations/m250707_103609_tree.php

@@ -9,7 +9,6 @@ class m250707_103609_tree extends Migration
     public function safeUp()
     {
         $rawPrimaryKey = 'NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY';
-        $tableOptions = [];
 
         if ($this->db->driverName === 'mysql') {
             $tableOptions = 'ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci';
@@ -24,7 +23,7 @@ public function safeUp()
                 'rgt' => $this->integer()->notNull(),
                 'depth' => $this->integer()->notNull(),
             ],
-            $tableOptions,
+            $tableOptions ?? null,
         );
 
         $this->createIndex('idx_tree_lft', '{{%tree}}', 'lft');

migrations/m250707_104009_multiple_tree.php

@@ -24,7 +24,7 @@ public function safeUp()
                 'rgt' => $this->integer()->notNull(),
                 'depth' => $this->integer()->notNull(),
             ],
-            $tableOptions,
+            $tableOptions ?? null,
         );
 
         $this->createIndex('idx_multiple_tree_tree', '{{%multiple_tree}}', 'tree');