* fix: omit the tenant allowance from the header limit alert

Hitting the tenant cap still shows on the billing page, but it should not raise the header Limit reached banner.

* fix: close the upgrade dialog after an in-place plan change

A saved card updates the plan without a Stripe checkout, so dismiss the dialog when that succeeds.

* feat: show plan limits for crons, schedules, and webhooks

These usage rows were live counts. Draw them against the current plan cap and open a per-tenant breakdown.