Release v4.219.0

Added

• Reducers that publish a public event can now carry a from filter on an event source or one of its streams. Stage renders the same source and stream filter attributes as for ordinary reducers, and rendering such a reducer on its own slice no longer fails. (#928)
• Joins inside root-level nested objects now render as nested Chronicle joins. Joins under children, joins on the nested object's own key (id), and removals inside nested objects are still refused. (part of #117)