Move django.conf settings import to module top in quotas

llm_be/finance/services/quotas.py

@@ -6,6 +6,7 @@ from dataclasses import dataclass
 from datetime import timedelta
 from typing import Any
 
+from django.conf import settings
 from django.db.models import Count, Q, Sum
 from django.utils import timezone
 
@@ -165,8 +166,6 @@ def get_usage_snapshot(user) -> UsageSnapshot:
 
 
 def assert_feature_allowed(user, feature: str) -> None:
-    from django.conf import settings
-
     if not getattr(settings, "ENFORCE_SUBSCRIPTION_GATES", True):
         return
 
@@ -249,8 +248,6 @@ def assert_within_quotas(user) -> UsageSnapshot:
 
 def check_generation_allowed(user, *, feature: str = "text_generation") -> UsageSnapshot:
     """Combined feature + quota gate for a chat turn."""
-    from django.conf import settings
-
     if not getattr(settings, "ENFORCE_SUBSCRIPTION_GATES", True):
         return get_usage_snapshot(user)
     assert_feature_allowed(user, feature)