Force stack reconcile

Triggers a one-shot reconcile for a specific stack. This creates and executes a reconcile command that reverts any out-of-band changes to managed resources on the stack back to their last-known desired state. The reconcile is equivalent to re-applying the last reconcile snapshot. The command executes asynchronously — use the returned command_id to poll for completion via GET /commands/:id/status.

Side effects: This endpoint creates real infrastructure changes. Any resources that have been modified outside of formae since the last reconcile will be reverted to their managed state. This is a destructive operation for out-of-band changes.