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# Billing cycle day capped at 28

> Customers signing up on the 29th-31st now anchor to the 28th to avoid month-end edge cases on shorter months.

February-only customers used to see odd behaviour because their billing cycle "day" didn't exist in some months. We cap the cycle anchor at the 28th to make every month consistent.

* Limited the billing cycle day to a maximum of 28 for new and existing subscriptions.
* Enhanced cycle calculation to set the first cycle's start time to the requested time, removing the special-case logic that shifted late-night signups to the next day.
* Refactored invoice calculation to use the invoice creation date and to update subscription dates from there.