Release v4.85.0

Added

• The Stage Host (Play and the spec runner) now protects personal-data and secret concept values in its own event store, as rendered applications do. Chronicle encrypts them at rest and releases them on read, and personal data can be erased through Chronicle's key deletion keyed by the event source. Events stored before this release stay in plain text. (#346)

Changed

• Secret concepts that aren't text (Int, Decimal, Bool, Date, DateTime, Uuid) are refused with STAGE-ESM-041, both when rendering and in the Host, because Chronicle can't yet store them (see Cratis/Chronicle#4813). pii secret concepts use personal-data protection and are not affected. (part of #346)