* Revert "Address the real lifetime issue of the SDK's `Client` by making `Context.mediaProvider` weak. (#4466)"
This reverts commit b9d1558216.
* Better docs.
* Update the template screen to use the new(ish) Observation framework.
* Add a variant of deferFulfillment that supports observables.
* Update snapshot fulfilment to work with either a publisher or a stream.