chore(security): enhance environment configuration, CI workflows, and wallet daemon with security improvements

- Restructure .env.example with security-focused documentation, service-specific environment file references, and AWS Secrets Manager integration
- Update CLI tests workflow to single Python 3.13 version, add pytest-mock dependency, and consolidate test execution with coverage
- Add comprehensive security validation to package publishing workflow with manual approval gates, secret scanning, and release

docs/10_plan/26_production_deployment_infrastructure.md

@@ -4,7 +4,7 @@
 **Priority**: 🔴 HIGH  
 **Phase**: Phase 5.2 (Weeks 3-4)  
 **Timeline**: March 13 - March 26, 2026  
-**Status**: 🔄 IN PROGRESS
+**Status**: ✅ COMPLETE
 
 ## Executive Summary