data sources pagination and sorting

[josh-chamberlain]

Context

Makes #75 easier. In general, with a paginated endpoint, it's helpful to allow users to sort_by

Requirements

• [ ] add pagination to the GET/data-sources endpoint of 100 rows (we already do this for agencies)
• [ ] add optional sort_by param which allows a user to specify a property
  • default to recent created_at; allowing last_updated would be good too
  • accept sort_order param which allows desc (default) or asc

Tests

• are the most recent results returned by default?

Docs

• the API docs should make it clear that these are options + what the defaults are

Open questions

• would this require front-end refactoring?

[maxachis]

@josh-chamberlain This has been addressed in Data Sources. The way I've designed things, it wouldn't take too much for me to add the sorting to Agencies and Data Requests (they both already have pagination). Would you like me to do that?

[josh-chamberlain]

@maxachis Yes, I suppose that would be best for symmetry and consistency, wouldn't it! Thanks.