Use modified time instead of created time for recording search queries

[dojutsu-user]

We should use modified time here and not the created time.
modified time gets updated automatically, so the query should also be changed.

readthedocs.org/readthedocs/search/tasks.py

Lines 213 to 214 in 98a7ff1

	obj.created = time
	obj.save()

readthedocs.org/readthedocs/search/tasks.py

Lines 159 to 163 in 98a7ff1

	partial_query_qs = SearchQuery.objects.filter(
	project__slug=project_slug,
	version__slug=version_slug,
	created__gte=before_10_sec,
	).order_by('-created')

Ref: #6088 (comment)

[Iamshankhadeep]

@dojutsu-user what do I need to know to start working on this issue?

[dojutsu-user]

Hi @Iamshankhadeep
You can start working on this (Just a little knowledge of django ORM is required)
I think the issue description mentions everything.
Feel free to ask any doubts/questions if you get stuck anywhere. 😃

[Iamshankhadeep]

@dojutsu-user never worked on django so trying to put together the pieces. I think we just need to change obj.created to obj.modified and order_by('-created') to order_by('-modified') right?