refactoring: add type hints to siteabsoluteurl filter fu.
refactoring: add type hints to siteabsoluteurl filter fu.

geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/osmaxx