Stock update (RTC-27312)

ItemTransactionMerger job has been extended with stock update logic:

• When item has stock in InventoryService, then stock for this item in sender store is properly update with stock value from incoming transaction;
• When item has no stock in InventoryService, then new entry for this item and sender store is created with stock value taken from incoming transaction.

The stock changes from StockAdjustment transactions are properly registered and updated in InventoryService.

Sales transaction processing (RTC-27311 ,RTC-27313)

Added support of processing receipts with type sale, updating stock in Inventory module based on sold amount. 

Support for Sale transaction has been added to POSLogProcessing and ItemTransactionImport jobs.
Incoming POSLogs with TransactionType="Normal" and with valid RetailTransaction content are properly processed and saved to the staging tables in Inventory Service.

The items' stock is properly updated in InventoryService based on sales transaction data.
Sales data is read from staging tables, processed and properly saved in the InventoryService database
Item transactions are created in each job's run,  single item transaction has all items with aggregated stocks within single store from all read events.

Internal Use transactions (RTC-27671)

ItemTransactionMerger support for InternalUse transactions has been added. InternalUse transactions are created in InventoryService and stocks are properly updated.

Grid view of items and stock levels (RTC-22717)

Added grid view allows user to see, filter and sort stock of items. 
File exporter job has been added to the InventoryIntegrationPackage. It exports stock to excel and saves them into blob container named "Inventory"
Note: Function "Export to Excel" requires additional setup before enabled in each environment.