chore: bump version to 0.5.7

Co-Authored-By: Claude <noreply@anthropic.com>

Author: rayketcham

CLAUDE.md

@@ -2,7 +2,7 @@
 
 Standalone code signing engine — Authenticode, PKCS#7, RFC 3161 timestamping, detached CMS signing, PowerShell SIP.
 
-**Version:** 0.5.5 | **License:** Apache-2.0 | **Date:** 2026-03-19
+**Version:** 0.5.7 | **License:** Apache-2.0 | **Date:** 2026-03-25
 
 ## MANDATORY Rules
 ### Bash Commands: NO CHAINING (CRITICAL)

Cargo.lock

@@ -3,7 +3,7 @@ resolver = "2"
 members = ["crates/pki-sign"]
 
 [workspace.package]
-version = "0.5.5"
+version = "0.5.7"
 edition = "2021"
 rust-version = "1.88"
 license = "Apache-2.0"

Cargo.toml

@@ -22,7 +22,7 @@ No OpenSSL. No `signtool.exe`. No external dependencies. One binary.
 [![OpenSSL](https://img.shields.io/badge/OpenSSL-not%20required-brightgreen?logo=openssl&logoColor=white)](https://github.com/rayketcham-lab/PKI-Signing-Service)
 
 <!-- Project Info -->
-[![Version](https://img.shields.io/badge/version-0.5.5-blue?logo=semver&logoColor=white)](https://github.com/rayketcham-lab/PKI-Signing-Service/releases/latest)
+[![Version](https://img.shields.io/badge/version-0.5.7-blue?logo=semver&logoColor=white)](https://github.com/rayketcham-lab/PKI-Signing-Service/releases/latest)
 [![License: Apache-2.0](https://img.shields.io/badge/license-Apache--2.0-green?logo=apache&logoColor=white)](LICENSE)
 [![Rust](https://img.shields.io/badge/language-Rust-orange?logo=rust&logoColor=white)](https://www.rust-lang.org/)
 [![MSRV](https://img.shields.io/badge/MSRV-1.88-orange?logo=rust&logoColor=white)](https://blog.rust-lang.org/)