Epsilon app improvement (RTP-37715)

Switching between Epsilon app and POS screen can be done without any issues encountered.

Performance Improvements in EG POS (RTP-36908)

These updates improve system speed and efficiency:

• Item data is cached for 60 seconds during scanning and adding items, reducing load times.
• Unnecessary operations after fetching finished receipts are removed.
• Creating web orders from item search is optimized for faster processing.