Minimum surface a media buy needs to expose for the preflight helpers to
operate. Picks the fields the helpers actually read so callers can pass
either a MediaBuy, a CreateMediaBuySuccess, an UpdateMediaBuySuccess,
or a get_media_buys entry. Optional fields match the schema; required
fields are required by the helpers themselves.
Minimum surface a media buy needs to expose for the preflight helpers to operate. Picks the fields the helpers actually read so callers can pass either a
MediaBuy, aCreateMediaBuySuccess, anUpdateMediaBuySuccess, or aget_media_buysentry. Optional fields match the schema; required fields are required by the helpers themselves.