Tested this locally by creating a dummy migration that slept for 10 seconds. During this time, keyserver endpoints were unavailable but the health check returned an OK response. Upon completing the migration,
both the health route and keyserver endpoints were available.
Also temporarily modified the health check route to timeout infinitely. Upon finishing the migration, the ongoing health check was terminated and the express server keyserver endpoints was able to be initialized.
Will not land without testing on AWS, ensuring a healthy primary node goes online with a dummy migration running past the default AWS grace period