Added statistics cache

vpn/migrations/0005_userstatistics.py

@@ -0,0 +1,45 @@
+# Generated migration for UserStatistics model
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('vpn', '0004_merge_20250721_1223'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='UserStatistics',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('server_name', models.CharField(max_length=256)),
+                ('acl_link_id', models.CharField(blank=True, help_text='None for server-level stats', max_length=1024, null=True)),
+                ('total_connections', models.IntegerField(default=0)),
+                ('recent_connections', models.IntegerField(default=0)),
+                ('daily_usage', models.JSONField(default=list, help_text='Daily connection counts for last 30 days')),
+                ('max_daily', models.IntegerField(default=0)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'User Statistics',
+                'verbose_name_plural': 'User Statistics',
+            },
+        ),
+        migrations.AddIndex(
+            model_name='userstatistics',
+            index=models.Index(fields=['user', 'server_name'], name='vpn_usersta_user_id_1c7cd0_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='userstatistics',
+            index=models.Index(fields=['updated_at'], name='vpn_usersta_updated_8e6e9b_idx'),
+        ),
+        migrations.AlterUniqueTogether(
+            name='userstatistics',
+            unique_together={('user', 'server_name', 'acl_link_id')},
+        ),
+    ]