fix: round website rates to two decimals

backend/app/routers/websites.py

@@ -45,6 +45,7 @@ from app.services.website_sync import (
     sync_account_priorities_for_upstream,
 )
 from app.utils.auth import get_current_user
+from app.utils.number import fixed_decimal_number
 
 router = APIRouter(tags=["websites"])
 logger = logging.getLogger(__name__)
@@ -339,7 +340,7 @@ def import_groups_from_upstream(
                 "name": target_name,
                 "description": group.get("description") or f"Imported from {upstream.name} / {source_name}",
                 "platform": group.get("platform") or "openai",
-                "rate_multiplier": _source_group_rate(group),
+                "rate_multiplier": fixed_decimal_number(_source_group_rate(group), 2),
             }
             if group.get("rpm_limit") is not None:
                 create_body["rpm_limit"] = group.get("rpm_limit")