add more multiuser support

atlas/migrations/0108_multiusersession.py

@@ -0,0 +1,27 @@
+# Generated by Django 6.0.1 on 2026-06-16 11:53
+
+import django.db.models.deletion
+import uuid
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('atlas', '0107_caseprior_relation_type'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='MultiuserSession',
+            fields=[
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('name', models.CharField(blank=True, max_length=255)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('active_case', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='atlas.case')),
+                ('creator', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='created_multiuser_sessions', to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]