fix: make statement published time match statement doc time (#6419)

* fix: make statement published time match statement doc time

* test: improve testing of creating statements

ietf/doc/tests_statement.py

@@ -255,6 +255,7 @@ This test section has some text.
                 statement.latest_event(NewRevisionDocEvent).rev, "00"
             )
             self.assertIsNotNone(statement.latest_event(type="published_statement"))
+            self.assertIsNotNone(statement.history_set.last().latest_event(type="published_statement"))
             if postdict["statement_submission"] == "enter":
                 self.assertEqual(statement.text_or_error(), "some stuff")
             else:

ietf/doc/views_statement.py

@@ -239,6 +239,7 @@ def new_statement(request):
                 rev=statement.rev,
                 by=request.user.person,
                 desc="Statement published",
+                time=statement.time,
             )
             statement.save_with_history([e1, e2])
             alias = DocAlias.objects.create(name=name)