collab: Add `token_spend_in_cents` column to `billing_subscriptions` table (#39404)

Marshall Bowers created

This PR adds a `token_spend_in_cents` and associated
`token_spend_in_cents_updated_at` column to the `billing_subscriptions`
table.

Release Notes:

- N/A

Change summary

crates/collab/migrations/20251002214229_add_token_spend_in_cents_to_billing_subscriptions.sql | 3 
1 file changed, 3 insertions(+)

Detailed changes