Release v19.16.1

Fixed

• On a kernel with more than one silo, on-demand (passive) read models no longer start returning nothing for every instance. Once a read model with children had been projected on one silo and cached on another, the next event for an existing child threw. The projection then returned no read model for any instance, and reported nothing, until the kernel restarted or the projection was registered again. Objects now keep their shape when sent between silos (Cratis.Orleans 1.12.2), and a projection that fails once no longer stays broken for every instance read after it. (#4337)