Fix default arguments are not respected when crafting cache key

- Better error message on format key errors (mismatch of key parameters/provided arguments)

py_cachify/_backend/_helpers.py

@@ -14,15 +14,16 @@
 
 
 def get_full_key_from_signature(bound_args: inspect.BoundArguments, key: str) -> str:
+    bound_args.apply_defaults()
     args_dict = bound_args.arguments
-    args: Tuple[str, Any] = args_dict.pop('args', ())
+    args: Tuple[Any, ...] = args_dict.pop('args', ())
     kwargs: Dict[str, Any] = args_dict.pop('kwargs', {})
     kwargs.update(args_dict)
 
     try:
         return key.format(*args, **kwargs)
-    except IndexError:
-        raise ValueError('Arguments in a key do not match function signature') from None
+    except (IndexError, KeyError):
+        raise ValueError(f'Arguments in a key({key}) do not match function signature params({bound_args})') from None
 
 
 def is_coroutine(