API improvements, statistics of emails related to issues

Description

Implement a new method in the JETI API that gives back the sum of messages sent/received related to an issue.

Environment

None

Status

Assignee

Tibor Hegyi

Reporter

Balázs Lakatos

Labels

None

Access to limited visibility issues

None

Product platform

None

Time tracking

3h

Feature Testing Estimate

2

Sprint

Fix versions

Priority

Major
Configure