Add stream_id to event for topic updates.

(imported from commit 2c0ff291672a2576e5812d8c3abdb71256ada61f)

zerver/lib/actions.py

@@ -2033,6 +2033,7 @@ def do_update_message(user_profile, message_id, subject, propagate_mode, content
         subject = truncate_topic(subject)
         event["orig_subject"] = orig_subject
         message.subject = subject
+        event["stream_id"] = message.recipient.type_id
         event["subject"] = subject
         event['subject_links'] = bugdown.subject_links(message.sender.realm.domain.lower(), subject)
         edit_history_event["prev_subject"] = orig_subject

zerver/test_events.py

@@ -273,6 +273,7 @@ class EventsRegisterTest(AuthedTestCase):
             ('orig_subject', check_string),
             ('rendered_content', check_string),
             ('sender', check_string),
+            ('stream_id', check_int),
             ('subject', check_string),
             ('subject_links', check_list(None)),
             # There is also a timestamp field in the event, but we ignore it, as