Add refresh buttons and optimize case series update

- Implemented refresh buttons for each exam/packet section and a global refresh button.
- Enhanced resource management in the atlas by allowing inline creation and attachment of resources.
- Redirected users back to the case within a case collection upon saving or cancelling edits.
- Optimized the case series update view to prevent hanging issues on production.
- Fixed an issue with the local-up script not shutting down running containers properly.

Add marker feedback field to useranswer model

- Created migrations to add a 'marker_feedback' field to the 'useranswer' model in both 'longs' and 'shorts' apps.
- The new field is a TextField that allows optional feedback for the marker, which will not be shown to the candidate.

shorts/migrations/0015_useranswer_marker_feedback.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-07-04 22:09
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shorts', '0014_useranswer_time_answered'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='useranswer',
+            name='marker_feedback',
+            field=models.TextField(blank=True, help_text='Feedback for the marker, this is optional and will NOT be shown to the candidate.', null=True),
+        ),
+    ]