- Remove obsolete instruction documents (PROMPT_*.md, SECURITY_FIXES.md)
- Update CLAUDE.md with security features, test suite, audit logs
- Merge Techstack_Dokumentation into INFRASTRUCTURE.md
- Update SECURITY.md with custom login route documentation
- Add changelog to TODO.md
- Update email service and data masking for SMTP error handling
- Extend test coverage for CSRF and data masking
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Add E-Mail system documentation (tenant-specific SMTP, API endpoint)
- Add Redis caching section
- Add complete Collections and Globals overview
- Update project structure with new directories
- Mark Portfolio collections and Email system as completed
- Update environment variables documentation
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>