feat: enhance Immich integration with local copy option and validation for image handling

backend/server/integrations/migrations/0002_immichintegration_copy_locally.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.1 on 2025-06-01 21:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('integrations', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='immichintegration',
+            name='copy_locally',
+            field=models.BooleanField(default=True, help_text='Copy image to local storage, instead of just linking to the remote URL.'),
+        ),
+    ]