- Fix Caddy L4 config to use "udp/:PORT" listen syntax for UDP proxy hosts
(previously used bare ":PORT" which Caddy treated as TCP)
- Fix TCP unused port test to check data echo instead of connection refusal
(Docker port mapping accepts TCP handshake even without a Caddy listener)
- Fix mTLS import test to wait for sheet close and scope cert name to table
- Fix CA certificate generate test to scope name assertion to table
- Remaining L4 routing test failures are infrastructure issues with Docker
port forwarding and Caddy L4 UDP listener startup timing
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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