feat(security): merge Phase 4b security hardening

Complete security hardening implementation including HTTPS enforcement,
security headers, rate limiting, and comprehensive security test suite.

Key features:
- HTTPS enforcement with HSTS support
- Security headers (CSP, X-Frame-Options, X-Content-Type-Options)
- Rate limiting for all critical endpoints
- Enhanced email template security
- 87% test coverage with security-specific tests

Architect approval: 9.5/10

Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
2025-11-20 18:28:50 -07:00
parent 115e733604
commit d3c3e8dc6b
23 changed files with 3762 additions and 7 deletions

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