fix: make the plugin work with the forum

[samuelallan72]

Description

This includes two fixes (see individual commits) - please don't squash merge:

fix: override FORUM_SEARCH_BACKEND

The Tutor forum plugin hardcodes FORUM_SEARCH_BACKEND to Meilisearch,
so we need to override it here,
otherwise the forum will continue to use Meilisearch.

and

fix: increase Typesense max-per-page server option

The forum sets a constant search comment count of 1000
( https://github.com/openedx/forum/blob/51ec507/forum/constants.py ),
and the Elasticsearch and Meilisearch backends respect that.
So to use this value for Typesense too,
we need to increase the max-per-page server option.
The default is 250 in Typesense.

Supporting information

• Private-ref: BB-9975
• openedx/forum#225 (PR to add support for the Typesense backend in forum)

Test instructions

• Set up a tutor devstack, with:
  • the typesense plugin from this branch
  • the forum branch from openedx/forum#225
• Create a test course in devstack
• Navigate to the course's discussion tab
• Create some posts and comments
• Perform some searches
• Verify search returns results and that there are no error messages relating to typesense in the logs.
• View the data indexed in Typesense (perhaps by using https://bfritscher.github.io/typesense-dashboard ), and verify it's up to date with what's in the forum
• View the Meilisearch dashboard ( http://meilisearch.local.openedx.io:7700 ), and verify there is no data indexed there relating to the forum.

Rough instructions for setting up the devstack:

cd devstack
git clone github.com/open-craft/forum
cd forum
git checkout samuel/typesense-backend
cd ..
tutor mounts add ./forum
tutor plugins enable forum

git clone github.com/open-craft/tutor-contrib-typesense
cd tutor-contrib-typesense
git checkout forum-fixes # oops sorry, I forgot to include my name in the branch name
cd ..
pip install -e ./tutor-contrib-typesense
tutor plugins enable typesense

tutor images build openedx-dev
tutor dev launch
tutor dev do importdemocourse

Deadline

None

[bradenmacdonald]

I didn't manually test this yet but it seems straightforward enough.

[samuelallan72]

Thanks @bradenmacdonald . :)