List the customer's marketing consent

Returns one entry per channel in the marketing allowlist with its EFFECTIVE opted-in boolean (opt-out always wins; a channel with no row reads opted-out), scoped to the authenticated buyer only (tenant-scoped, no other customer, no internal id). A buyer who has not proven inbox control reads the closed default (every channel opted-out) instead of the row owner's stored preferences, mirroring how `me` withholds the stored profile. Behind the publishable key, the `customer_accounts` flag, and the customer-auth middleware. Returns 200 with `{ channels }`. > **Note:** This endpoint requires the e-commerce feature to be enabled on your site.