style: apply ruff formatting

fastapi_traffic/core/config_loader.py

@@ -49,12 +49,14 @@ _GLOBAL_FIELD_TYPES: dict[str, type[Any]] = {
 }
 
 # Fields that cannot be loaded from config files (callables, complex objects)
-_NON_LOADABLE_FIELDS: frozenset[str] = frozenset({
-    "key_extractor",
-    "exempt_when",
-    "on_blocked",
-    "backend",
-})
+_NON_LOADABLE_FIELDS: frozenset[str] = frozenset(
+    {
+        "key_extractor",
+        "exempt_when",
+        "on_blocked",
+        "backend",
+    }
+)
 
 
 class ConfigLoader:
@@ -200,7 +202,11 @@ class ConfigLoader:
                     value = value.strip()
 
                     # Remove surrounding quotes if present
-                    if len(value) >= 2 and value[0] == value[-1] and value[0] in ('"', "'"):
+                    if (
+                        len(value) >= 2
+                        and value[0] == value[-1]
+                        and value[0] in ('"', "'")
+                    ):
                         value = value[1:-1]
 
                     env_vars[key] = value
@@ -261,7 +267,7 @@ class ConfigLoader:
 
         for key, value in source.items():
             if key.startswith(full_prefix):
-                field_name = key[len(full_prefix):].lower()
+                field_name = key[len(full_prefix) :].lower()
                 if field_name in field_types:
                     result[field_name] = value