Model Retraining Workflows, Version Deprecation & System Decommissioning

Master model retraining workflows, version deprecation, and system decommissioning for the IAPP AIGP certification. Analyze planned retraining cadences versus out-of-band emergency patching, version retirement lifecycles, cryptographic zeroization of retired model weights, balancing data deletion with regulatory litigation holds, and post-mortem knowledge preservation under ISO/IEC 42001 and NIST AI RMF.