Ref T8726. Make all the DifferentialRevision stuff modular.
- Maniphest Tasks
- T8726: Modularize Herald fields and actions
- Restricted Diffusion Commit
rP00b98eca541c: Modularize all DifferentialRevision fields
- Created a rule with all fields.
- Ran upgrade.
- Saw all fields preserved with new modular versions.
- Used test console to run rule with all fields, verified field values as broadly sensible.