chore: version bump to v1.2.1 for crates.io publishing

- Update version to 1.2.1 to resolve crates.io publishing conflict
- Update README and CHANGELOG to reflect v1.2.1
- Maintain all v1.2.0 Toyota Way and PMAT features

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: noahgift

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.2.1] - 2025-08-14
+
+### Fixed
+- Version bump to resolve crates.io publishing conflict
+
 ## [1.2.0] - 2025-08-14
 
 ### 🏭 Toyota Way Quality Excellence & PMAT Integration

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pmcp"
-version = "1.2.0"
+version = "1.2.1"
 edition = "2021"
 authors = ["PAIML Team"]
 description = "High-quality Rust SDK for Model Context Protocol (MCP) with full TypeScript SDK compatibility"

README.md

@@ -16,7 +16,7 @@ A high-quality Rust implementation of the [Model Context Protocol](https://model
 
 Code Name: *Angel Rust*
 
-## 🎉 Version 1.2.0 - Toyota Way Quality Excellence & PMAT Integration!
+## 🎉 Version 1.2.1 - Toyota Way Quality Excellence & PMAT Integration!
 
 - 🏭 **Toyota Way Implementation**: Zero-defect development with Jidoka, Genchi Genbutsu, and Kaizen principles
 - 📊 **PMAT Quality Analysis**: Comprehensive code quality metrics with TDG scoring (0.76)