Replaces the external job codes mapped to a project for each integration named in the request, either an account integration in Bench or a source key for one outside it. Integrations not named are left alone. Codes missing from a named integration are removed, and codes mapped to another project move to this one. Hours already synced for a removed or moved code are kept as detached weekly hours on the project they were logged against. Callable by service accounts, super admins, and account admins.