Code review: TLS handshake fix approved, ready to merge

[Copilot]

Completed comprehensive code review of the TLS handshake warning fix (PR addressing issue #198). The implementation correctly resolves server-side incomplete handshake warnings by using proper TLS connections for HTTPS health checks.

Review Findings

Implementation Quality ✅

• Proper use of tls.DialWithDialer for HTTPS endpoints with correct SNI configuration
• --insecure flag behavior is consistent across health checks and webhook forwarding (both use shared TLSClientConfig)
• Thread-safe health status tracking using atomic operations
• No resource leaks, proper connection cleanup

Test Coverage ✅

• 11 comprehensive test cases covering healthy/unhealthy servers, self-signed certificates (with/without verification), default port handling, and TLS handshake validation
• All tests pass, appropriate use of t.Skipf() for privileged port tests

Security ✅

• Certificate verification enabled by default
• --insecure flag properly documented as dangerous, local-dev only
• No credential exposure in error messages

Documentation ✅

• Both README.md and REFERENCE.md updated with clear examples
• Security warnings are prominent

Recommendation

Approve - No bugs or security issues found. Code is production-ready.

Optional minor improvement: Comment at healthcheck.go:32-37 mentions "3s timeout" but timeout is caller-controlled—could be more generic. Does not affect functionality.

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