Refresh the member tab after a single-member housekeeper run

_execute_housekeeper_run() showed the success dialog but never called
refresh()/on_changed(), so retroactively created claims/payments stayed
invisible in the currently open Mitgliedsakte until it was closed and
reopened, and the overview list wasn't notified either. Match the pattern
used by every other mutating action in this file (save, payment, credit,
reminder, ...): refresh the tab's own contribution lists and notify the
overview callback right after the run succeeds.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/ccma/ui/member_tab.py

@@ -629,6 +629,8 @@ class MemberTab(ttk.Frame):
             f"{len(member_findings)} offene(r) Vorgang/Vorgänge für dieses Mitglied.",
             parent=self,
         )
+        self.refresh()
+        self.on_changed()
 
     def _build_timeline(self, parent: ttk.Frame) -> None:
         parent.columnconfigure(0, weight=1)