fix(registration): seed gamification profile with eventify_id on account creation

Added _seed_gamification_profile() helper that inserts a row into
user_gamification_profiles immediately after user.save(), so every new
account has their eventify_id in the Node.js gamification DB from day one.
Non-fatal: failures are logged as warnings without blocking registration.
Called in both RegisterView (mobile) and WebRegisterView (web).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

mobile_api/views/user.py

@@ -10,12 +10,32 @@ from rest_framework.authtoken.models import Token
 from mobile_api.forms import RegisterForm, LoginForm, WebRegisterForm
 from rest_framework.authentication import TokenAuthentication
 from django.contrib.auth import logout
+from django.db import connection
 from mobile_api.utils import validate_token_and_get_user
 from utils.errors_json_convertor import simplify_form_errors
 from accounts.models import User
 from eventify_logger.services import log
 
 
+def _seed_gamification_profile(user):
+    """Insert a gamification profile row for a newly registered user.
+    Non-fatal: if the insert fails for any reason, registration still succeeds."""
+    try:
+        with connection.cursor() as cursor:
+            cursor.execute("""
+                INSERT INTO user_gamification_profiles (user_id, eventify_id)
+                VALUES (%s, %s)
+                ON CONFLICT (user_id) DO UPDATE
+                    SET eventify_id = COALESCE(
+                        user_gamification_profiles.eventify_id,
+                        EXCLUDED.eventify_id
+                    )
+            """, [user.email, user.eventify_id])
+    except Exception as e:
+        log("warning", "Failed to seed gamification profile on registration",
+            logger_data={"user": user.email, "error": str(e)})
+
+
 @method_decorator(csrf_exempt, name='dispatch')
 class RegisterView(View):
     def post(self, request):
@@ -24,6 +44,7 @@ class RegisterView(View):
             form = RegisterForm(data)
             if form.is_valid():
                 user = form.save()
+                _seed_gamification_profile(user)
                 token, _ = Token.objects.get_or_create(user=user)
                 log("info", "API user registration", request=request, user=user)
                 return JsonResponse({'message': 'User registered successfully', 'token': token.key}, status=201)
@@ -51,6 +72,7 @@ class WebRegisterView(View):
             if form.is_valid():
                 print('2')
                 user = form.save()
+                _seed_gamification_profile(user)
                 token, _ = Token.objects.get_or_create(user=user)
                 print('3')
                 log("info", "Web user registration", request=request, user=user)