Tag new orders with course code for bookings

Bookings lack explicit course tags, leaving instructors without roster context or gear lists. Add the course code to orders so teams can prep for trips ahead of departure.

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Overview

Bookings without explicit course identifiers slow prep and leave instructors underinformed; this flow attaches the right course code to each order as soon as the booking arrives. That gives program coordinators immediate roster visibility and lets teams finalize gear and communications ahead of each trip.