Changes to List creator campaigns

added the optional property campaigns/items/economics/oneOf[subschema #1: CPM]/organicViewsOnly to the response with the 200 status

added the optional property campaigns/items/economics/oneOf[subschema #3: Pool]/organicViewsOnly to the response with the 200 status

added the optional property campaigns/items/economics/oneOf[subschema #1: CPM]/engagementTypes to the response with the 200 status

added the optional property campaigns/items/economics/oneOf[subschema #1: CPM]/metric to the response with the 200 status

the response property campaigns/items/maxPostAgeMinutes became nullable for the status 200

added the new facebook enum value to the campaigns/items/platforms/items response property for the response status 200

added the new pinterest enum value to the campaigns/items/platforms/items response property for the response status 200

added the new threads enum value to the campaigns/items/platforms/items response property for the response status 200

added the new twitter enum value to the campaigns/items/platforms/items response property for the response status 200

added the optional property campaigns/items/caps/maxXReadSpendCents to the response with the 200 status

added the required property campaigns/items/activatedAt to the response with the 200 status

added the required property campaigns/items/payableCents to the response with the 200 status

endpoint added