OpenDCB's own crypto-shredding solution for GDPR/DPDP Act/RBI/PCI-DSS-style "right to be forgotten" erasure: per-data-subject AES-256-GCM keys, envelope-encrypted by a pluggable master key, wrapped around a delegate org.axonframework.conversion.Converter. Erasure destroys the subject's key rather than rewriting the immutable event log. Not an implementation of Axon's paid axoniq-data-protection module, which does not exist in the free org.axonframework ...