Implement compression of objects before they are saved into the storage
provider. Each container type can specify which algorithm to use
(currently `none` or `zstd`) and the compression level.
Add infrastructure to pypeline that allows containers to be notified
when they are being used last, this allows two things:
* `Pipe`s eagerly clearing those containers once they are done reading
their contents
* `ScheduledTask`s clearing those out at the end of their execution in
case the pipe did not do it
This overall should improve memory usage as container no longer take up
memory if they are no longer used as part of a `Schedule`.
Store the contents of the files deserialized by `BinariesContainer` to
disk via `TemporaryFile`. This also allows some pipes to avoid shuffling
data around since they needed a file on disk anyways.
Introduce the `ImportFiles` pipe which leverages the newly-introduced
`FileStorage` to fetch the required files and store them in the
`BinariesContainer`.
Giacomo Vercesi