dsh-canary-decision-proof: An Evidence Generator for Offline Validation of Canary Decisions

`dsh-canary-decision-proof` is a controller-agnostic, offline evidence verification tool designed to substantiate the rationale for decisions in progressive delivery. It generates content-addressed reports by validating evidence integrity, computing deterministic metrics using positive fixed-point integer arithmetic, and following the precedence logic “invalid evidence → pause, metric failure → abort, otherwise → release.” This plugin does not perform rollouts; it only provides deterministic verification at the audit level, making it suitable for scenarios requiring strict compliance and review.