US-WG2-005 Customer-contractor interaction via chat

@Michael Semirunnyj (Unlicensed)

WG2

BR-WG2-005

PERS-WG2-Jeff (contractor, technical specialist)

As a Contractor Jeff, i want to chat with the customer in the app in order to be able:
- ask additional questions about his technique;
- send media files (photo\video) to confirm the work done or capture any additional hidden problems;
- make calls via app.

NEW

MUST HAVE