[GEN-E4] Emission renders a resolved plan and shares one converter skeleton #481

Part of #350, the quality-refactoring roadmap (road to 1.0, step 3).

Goal: Emission renders a resolved plan and shares one converter skeleton.

Lane: Generator. Status: todo.

Every PR of this epic starts its title with [GEN-E4]. The finding issues it closes are linked as sub-issues; this issue closes when the epic's last PR merges and master CI is green.