collab: Add `orb_customer_id` to `billing_customers` (#36310)

Marshall Bowers created

This PR adds an `orb_customer_id` column to the `billing_customers`
table.

Release Notes:

- N/A

Change summary

crates/collab/migrations/20250816133027_add_orb_customer_id_to_billing_customers.sql | 2 
1 file changed, 2 insertions(+)

Detailed changes