Release v19.49.0

Every-mappings now cover events handled only by child collections, and projection preview returns the same documents as the saved projection for children and joins.

Changed

• Every-event mappings (FromEvery, FromAll, model-bound [FromEvery], and PDL every) now also apply to events handled only by child or nested-child collections. The mapped values are written to the parent read model the child belongs to. Opt out with ExcludeChildProjections() in the fluent builder or exclude children in PDL; model-bound [FromEvery] always includes children (#4725)

Fixed

• Projection preview, used when querying a projection declaration from a client and in the Workbench projection editor, now returns the documents the saved projection would persist. Keyed child updates update the existing child instead of adding a duplicate, removed children are removed, and join events from another event source update every read model they join into instead of creating documents of their own (#4727)
• Child projections computed on demand for a single read model no longer keep children removed with RemovedWith (part of #4542)
• When a child is removed through RemovedWithJoin, the parent read models it belonged to still receive their every-event mappings (#4725)
• The documentation examples for model-bound child updates, child joins and child removal through a join now match how child joins correlate, so they run as described (#4725)