Refactor User model: update mobile field to allow null values, enforce unique id_card, and implement user filtering API endpoint

api/migrations/0009_alter_user_mobile.py

@@ -0,0 +1,17 @@
+# Generated by Django 5.1.2 on 2025-03-24 10:36
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("api", "0008_alter_user_mobile"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="user",
+            name="mobile",
+            field=models.CharField(blank=True, max_length=255, unique=True),
+        ),
+    ]