Feature/region project viz api

[thenav56]

Changes

• Add API For Regional 3W
• Add Secondary Tag COVID
• Update Project Filter
• Using Integer for Filter/Create/Update for enumfield for Project.

Checklist

Things that should succeed before merging.

• 3W Aggregated visualization of regional data  go-frontend#1019

[batpad]

@thenav56 this looks really good to me.

Some of the queries there, of course, are pretty wild. Can we ticket out writing tests for some of the more complex queries and aggregations there? Some basic tests for some of the more complex aggregations will probably really, really help, and hopefully we are able to get to them.

But this looks really good to me, learned a few new things about the ORM :-)

[batpad]

Also @thenav56 - not sure how much you've already done, but it would be great to ensure we've done some inspecting and tuning of the queries generated here. Again, if you think there is likely scope to improve query performance, add indexes, etc. please create a ticket - I don't think it should hold us back, but it seems likely that spending some time with EXPLAIN ANALYZE and indexes may help provide some obvious speed-ups. Of course, if you feel that's already done and you have a good sense of query performance here, no need to ticket separately.

[batpad]

@thenav56 - can you ping @GregoryHorvath if this should be merged to staging?

[thenav56]

@batpad Sure will look into EXPLAIN ANALYZE to make sure the query is optimized.
And I will make sure to add tests addressing this on the next PR.