add leaderboard

task/migrations/0006_challenge_pass_score.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-03-09 11:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('task', '0005_alter_task_options_alter_task_display_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='challenge',
+            name='pass_score',
+            field=models.FloatField(blank=True, null=True, verbose_name='通过分数线'),
+        ),
+    ]