feat: M2 database migration runner with Phinx and initial schema

db/migrations/20261011120002_create_models.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+use Phinx\Migration\AbstractMigration;
+
+/**
+ * Schema: models as logical catalog items.
+ *
+ * Each model belongs to a folder and represents a logical 3D model consisting
+ * of one or more files (STL parts, images, documents). Models have metadata
+ * including categories, tags, notes, and optional source URL.
+ */
+final class CreateModels extends AbstractMigration
+{
+    public function change(): void
+    {
+        $this->table('models', ['id' => 'id', 'primary_key' => 'id'])
+            ->addColumn('folder_id', 'integer', ['null' => false, 'signed' => false])
+            ->addColumn('name', 'string', ['limit' => 255])
+            ->addColumn('notes', 'text', ['null' => true])
+            ->addColumn('source_url', 'string', ['limit' => 2048, 'null' => true])
+            ->addColumn('added_at', 'timestamp', ['default' => 'CURRENT_TIMESTAMP', 'timezone' => true])
+            ->addColumn('updated_at', 'timestamp', ['default' => 'CURRENT_TIMESTAMP', 'timezone' => true])
+            ->addForeignKey('folder_id', 'folders', 'id', ['delete' => 'RESTRICT', 'update' => 'NO_ACTION'])
+            ->addIndex(['folder_id', 'name'], ['unique' => true, 'name' => 'idx_models_folder_name'])
+            ->addIndex(['added_at'], ['name' => 'idx_models_added_at'])
+            ->create();
+    }
+}