Exorcist & Warehouse Integration Plan

[atravitz]

This is a meta-issue to outline the order in which PRs should be merged, and what (if any) work needs to be done.

In general, my intention is to write user-facing docs for each item, request sign-off by @ethanholz (at minimum, to ensure the code is fully handed off), then consider these ready for merging.

new features, non-breaking changes:

• epic: warehouse #1864: needs user-facing docs, but otherwise is unblocked
  • docs work at: [WIP] warehouse: docs #1988
• feat: exorcist worker  #1833: downstream of epic: warehouse #1864, example exorcist implementation that uses a filesystem warehouse and therefore is not blocked by Epic: context & storage gufe#753.

new features, breaking changes:

• Epic: context & storage gufe#753: these are the breaking changes.
• (no PR yet) After Epic: context & storage gufe#753) are made, we can then go back to the code touched by epic: warehouse #1864 to take full advantage of the new context & storage objects. This will be a breaking change in openfe.

miscellaneous note: I would like to come up with a better name than Warehouse if we can - the name currently evokes archival storage in a way that isn't helping us!