Release 2322

Trello card

https://trello.com/c/n6kwbkSI

Context

Non-onboarded schools are included in the search results, which are not useful to the candidates.

We want to display only onboarded schools with availability.

Changes proposed in this pull request

• Add the onboarded scope in the schools model
• Scope the search results to return only onboarded schools

Guidance to review