Add InventoryHistory query and InventoryTransfer search type

The API now offers the new inventoryHistory query, which returns paginated groups of inventory adjustments. Exactly one of inventoryItemId or variantId must be supplied, optionally filtered by locationId, and the response adheres to standard GraphQL pagination arguments (first, last, before, after, reverse, sortKey). The sortKey can be either CREATED_AT or ID, as defined in the new AdjustmentGroupSortKeys enum. Pagination results are delivered through InventoryAdjustmentGroupConnection and its edges, exposing node details and cursor information. The InventoryAdjustmentGroupEdge type presents the individual adjustment group along with its cursor. Additionally, the SearchResultType enum is extended with the INVENTORY_TRANSFER value, allowing inventory transfer objects to appear in search queries.