Release v4.84.1

Changed

• @sensitive now means an operational secret, not personal data: encrypted at rest without erasure and withheld from the causation chain. C# providers render it as [Encrypted] and [NotAudited], and @pii @sensitive as [PII] only. The concepts guide, diagnostics reference and editor hovers describe this mapping, and decision record 0034 records it (#384)

Fixed

• PLAY0515 also rejects @sensitive concepts used as a command identifier, an explicit for destination or an event-source identifier, since an event source id can be neither encrypted nor erased (#384)
• The concepts guide and the @pii hover no longer claim that Chronicle applies @pii and @sensitive rules automatically (#384)