Release v0.6.10

Security and Code Quality Improvements

Security Fixes:
- Upgrade TLS to 1.3 with fallback support
- Replace sprintf with snprintf to prevent buffer overflow
- Remove system() calls and format string vulnerabilities
- Add fork security check to GitHub Actions

Code Quality:
- Reduce code duplication from 23.2% to <3%
- Reduce complexity across all modules (Phase 1-6 complete)
- Eliminate 225+ lines of duplicated code in translators
- Refactor to struct-based parameters

Refactoring:
- Extract common HTTP request logic
- Implement generic JSON path parser
- Consolidate retry and prompt logic
- Introduce render_base helper system

SonarCloud Issues Resolved:
- All BLOCKER/CRITICAL issues fixed
- 57 HIGH severity issues documented for Phase 8

No new features - focused on security hardening and maintainability.