Draft: simplified roll()

a huge part of the code was simplified because now allow center on dt-windows, do we dont have to implement it ourself.

saqc/core/modules/residues.py

@@ -29,10 +29,8 @@ class Residues:
         field: str,
         window: Union[str, int],
         func: Callable[[np.ndarray], np.ndarray] = np.mean,
-        set_flags: bool = True,
         min_periods: Optional[int] = 0,
         center: bool = True,
-        flag: float = BAD,
         **kwargs
     ) -> saqc.SaQC:
         return self._defer("calculateRollingResidues", locals())