feat: implement attachment management with upload, delete, and permission checks; update serializers and models

backend/server/adventures/migrations/0019_alter_attachment_file.py

@@ -0,0 +1,19 @@
+# Generated by Django 5.0.8 on 2025-01-19 22:17
+
+import adventures.models
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('adventures', '0018_attachment'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='attachment',
+            name='file',
+            field=models.FileField(upload_to=adventures.models.PathAndRename('attachments/')),
+        ),
+    ]