feat(webservices): Log completion of webservices jobs in the ChimeraX…

… log

Fixes Trac#16721

src/bundles/webservices/src/cxservices_job.py

@@ -235,6 +235,12 @@ def monitor(self, poll_freq_override: Optional[int] = None) -> None:
             and self.end_time is None
         ):
             self.end_time = datetime.datetime.now()
+        if self.session.ui.is_gui:
+            self.session.ui.thread_safe(
+                self.session.logger.info,
+                f"Webservices job finished: {self.job_id}"
+            )
+
 
     def exited_normally(self) -> bool:
         """Return whether background process terminated normally."""