Scanner regex fixes (reduce false positives):
- ai_context_scanner.py: 8 fixes - bounded quantifiers, word boundaries
- tool_callback_scanner.py: 3 fixes - OR grouping, bounded .* patterns
- owasp_llm_scanner.py: 4 fixes - prompt injection patterns
- prompt_leakage_scanner.py: 3 fixes - logging/error patterns
- rag_security_scanner.py: 3 fixes - file types, mixed trust patterns
- mcp_server_scanner.py: CVE-2025-6514 false positive fix

macOS installer fixes:
- Fixed rubocop showing "failed" when actually installed
- gem install --user-install now correctly returns success with PATH warnings

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

Co-Authored-By: Claude <noreply@anthropic.com>