Add debug logging for failed WebEngineHistory deserialization

This sometimes fails with 'The data stream has read past the end of the data in
the underlying device', which turns up in crash reports around once a month.

This is somewhat similar to https://bugreports.qt.io/browse/QTBUG-117489 - but
without knowing the data and without being able to reproduce, it's unclear what
the culprit could be.

qutebrowser/browser/webengine/webenginetab.py

@@ -626,7 +626,14 @@ class WebEngineHistoryPrivate(browsertab.AbstractHistoryPrivate):
         return data
 
     def deserialize(self, data):
-        qtutils.deserialize(data, self._history)
+        try:
+            qtutils.deserialize(data, self._history)
+        except OSError:
+            dump = "\n".join(
+                bytes(line).hex(" ") for line in utils.chunk(bytes(data), 16)
+            )
+            log.webview.debug(f"Failed to deserialize history data:\n{dump}")
+            raise
 
     def _load_items_workaround(self, items):
         """WORKAROUND for session loading not working on Qt 5.15.