appspace data should include app metadata

[teleclimber]

Currently we only store the schema number in the appspace's metadata db. This means that if the appspace data is uploaded to a different appspace, there is no way to know if the new appspace app matches the app used prior.

Include enough metadata from the app currently being used to allow appspace data to be restored with confidence.

[teleclimber]

It might be best to just copy the app metadata file to the appspace data. That gives the maximum amount of information that can be given to ensure the app can be found / matched again. Plus it achieves a lot without introducing a new set of metadata fields about apps.