Added supplyChannel field to InventoryEntryQuantitySet Message

We added the field 'supplyChannel' to the InventoryEntryQuantitySet Message on the HTTP API and 'supplyChannel' and 'supplyChannelRef' fields to the GraphQL API. With these fields, you can check the Channel where changes took place.

Changes:

• [API] Added the supplyChannel field to InventoryEntryQuantitySetMessage.
• [GraphQL API] Changed the InventoryEntryQuantitySet type:
  • Added the supplyChannelRef field to the InventoryEntryQuantitySet type.
  • Added the supplyChannel field to the InventoryEntryQuantitySet type.

The following changes were introduced in terms of GraphQL SDL:

extend type InventoryEntryQuantitySet {
  supplyChannel: Channel
  supplyChannelRef: Reference
}