mokkunsuzuki-code / stage353 Star 0 Code Issues Pull requests Stage354: Signature Key Rotation Ledger Layer with Stage178 Assumption, Threat Model, and Guarantee Binding. Transparent key lifecycle tracking, signature key status recording, ledger chaining, and PQC migration-aware verification metadata. verification audit cybersecurity sha256 qsp zero-trust hash-chain supply-chain-security transparency-log remeda evidence-verification fail-closed transparency-chain Updated Jun 21, 2026 Python