Explicit stage policies

The problem

Every stage have at least two policies - when card could be moved to stage (stage enter criteria) and when it could leave stage (stage exit criteria).

If we used a physical board or a wall with stickies we could write those policies directly on the board for every stage and collaborate on them to improve the flow, in electronic board those policies are not shown anywhere so this sometimes causes discussions and single point of failure in flow - when only one or two project participant knows those policies.

The solution

Implement ability to set enter and exit criteria for every stage and view it directly from board.

We could give the ability to set those policies from single "Board configuration" view and view them by clicking the stage header.

Anyway technically this requires us to store those policies in kanban database, redis for now.

Milestone changed to Enterprise edition

moved issue from Backlog to Analysis

Reassigned to @v.tyubek

Title changed from Explicit stage policies and descriptions to Explicit stage policies

Milestone changed to 1.4.8-ee

moved issue from Analysis to Development

Milestone changed to %Enterprise edition

moved issue from Development to Analysis

Marked as unblocked