[permission] Add PermissionVar model

apps/permission/migrations/0002_permissionvar.py

@@ -0,0 +1,22 @@
+# Generated by Django 2.2.28 on 2022-10-10 17:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('permission', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PermissionVar',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.SlugField(unique=True, verbose_name='name')),
+                ('query', models.TextField(verbose_name='query')),
+                ('description', models.CharField(blank=True, max_length=255, verbose_name='description')),
+            ],
+        ),
+    ]