## Context
SyncExternalId should be renamed because this won't always represent an
id. For example, microsoft API does not use ids but dates for their
sync. Also we think external is a bit redundant so we are removing it.
Note: this field is not used by the front-end (and will probably never
be)
* feat: wip refactor default-value
* feat: health check to migrate default value
* fix: tests
* fix: refactor defaultValue to make it more clean
* fix: unit tests
* fix: front-end default value
