Shipped migration-parity detection for the Mana Foil app, exposing schema drift through the health endpoint and an hourly worker probe.

After splitting the app’s production and staging databases, the risk was a worker running against a schema its migrations had not reached. These changes make that condition visible instead of silent: the health endpoint reports whether applied migrations match the code’s expectations, and an hourly worker job probes that endpoint so drift is caught between deploys rather than by a user. The work landed as reviewed pull requests with the release procedure documented alongside it.