Assume the role of a Chief Information Security Officer (CISO) at a global bank. Assess the potential threats posed by quantum computing to current RSA and ECC cryptographic standards. Develop a comprehensive, multi-year migration strategy to transition the bank's infrastructure to post-quantum cryptographic primitives. Your strategy must include inventory classification, hybrid deployment phases, performance impact analysis, and a rollback plan in case new vulnerabilities are discovered in the selected post-quantum algorithms.