Make webserver resilient to database not starting up

[allisonking]

Closes #562

Code Changes

• Instead of failing, surface an issue if the server can't reach the database
• Fix health endpoint to only return healthy if the db is up too

Steps to Confirm

• change the database host in the docker-compose file
• nox -s api
• confirm in the logs that the database is unreachable
• go to localhost:8080/api/v1/health and confirm that the database is unhealthy

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation Updated:
  • documentation complete, or draft/outline provided (tag docs-team to complete/review on this branch)
  • documentation issue created (tag docs-team to complete issue separately)
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md

Description Of Changes

This PR updates how the webserver initializes so that even if the database is unreachable, the webserver is still able to spin up. The health command has also been updated to return various health statuses to provide better debugging for users.

[allisonking]

Would love some eyes on this to make sure I'm going in the right direction with how I interpreted the ticket. I'm doing some except Exception as error which pylint is complaining about because it's too broad, but it seems like that's what we want? want to make sure though!

Also I am getting destroyed by this unit test. I'm trying to mock a call and have not been succeeding, and then I discovered FastAPI mocks are kind of weird but I still haven't successfully mocked the call.

[allisonking]

I'm having trouble figuring out the failing test. It does fail locally for me too, but I'm having trouble seeing what the Internal Server Error is. I'm running nox -s api and when I navigate to http://localhost:8080/api/v1/data_use/visualize/graphs I see "Internal Server Error" but nothing in the logs about what it could be. Any tips?

[ThomasLaPiana]

@allisonking I'll take a look and get this over the line, I have a hunch of what it is but its hard to articulate (its a weird endpoint)

[ThomasLaPiana]

LGTM! @allisonking thanks!