storage: allow sorting objects with missing (receipt_)time (#36515)

wcs/qommon/storage.py

@@ -290,6 +290,9 @@ class StorableObject(object):
                 # on all systems so we go the cheap and almost ok way.
                 from .misc import simplify
                 key_function = lambda x: simplify(x.name)
+            elif order_by.endswith('_time'):
+                typed_none = time.gmtime(-10**10)  # 1653
+                key_function = lambda x: getattr(x, order_by) or typed_none
             else:
                 key_function = lambda x: getattr(x, order_by)
             objects.sort(key=key_function)