Add: user profile backfill management command

backend/api/user/management/commands/backfill_user_profiles.py

@@ -0,0 +1,17 @@
+# api/user/management/commands/backfill_user_profiles.py
+from django.core.management.base import BaseCommand
+from django.contrib.auth.models import User
+from api.user.models import UserProfile  # assuming you have a UserProfile model
+
+
+class Command(BaseCommand):
+    help = "Backfill user profiles for existing users"
+
+    def handle(self, *args, **options):
+        users = User.objects.all()
+        for user in users:
+            if not UserProfile.objects.filter(user=user).exists():
+                # create a new user profile
+                UserProfile.objects.create(user=user)
+                self.stdout.write(f"Created user profile for {user.username}")
+        self.stdout.write("Backfill complete")