Mark time slots as premium per inspector and apply surcharges automatically in booking

Users want a way to mark certain time slots as "premium" on each inspector's profile so that pricing can be individualized (e.g. evenings, weekends). They want those premium slots to apply surcharges automatically in the booking flow—in online scheduling, internal scheduler, and order forms—without manual adjustments after the fact. Users also want to choose whether clients see the fee and to override it when needed.

Why it matters: After-hours and premium-time pricing is common; automating it per inspector reduces manual follow-up and supports more flexible, demand-based pricing.