I want us to move off of killswitches in Redis coming from `workflow-orchestration` towards fetching killswitches from a simple JSON file.
I picked GCS over R2 because it lets us make objects fully public (no `Authorization` required) and I (Stanley) found no way to achieve the same thing with R2.
This pull request adds a script `scripts/edit-runtime-settings staging | production` that is going to let us edit the file.
