Lists suppression entries for a customer within a domain, optionally filtered by status.

This endpoint returns the raw list of matching entries only — it does not compute a
block/allow decision. Callers (e.g. a Journey Canvas step, right before an actual outbound
action) are responsible for interpreting the returned entries against their own context.

Required query parameters:

• domain
• brand

Optional query parameters:

• status — when omitted, every entry is returned regardless of status. Pass ACTIVE to get
  only entries that currently block outbound contact (excludes REVOKED and naturally expired
  entries); pass REVOKED to get only revoked entries (expiry is not considered for this
  filter).