chore: make apis nullable (#7763)

what:

- makes top level attributes of each object an optional field in the http layer where possible

RESOLVES CORE-2229

packages/modules/pricing/src/types/services/price-list.ts

@@ -13,6 +13,7 @@ export interface CreatePriceListDTO {
 export interface UpdatePriceListDTO {
   id: string
   title?: string
+  description?: string | null
   starts_at?: string | null
   ends_at?: string | null
   status?: PriceListStatus