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Wade Simmons
a4c813fd26
Fields 6 and 7 are reserved for work in progress, so the multiport lane adverts move up to 9 and 10. Both are still single-byte tags, so the encoded payload size does not change. Also emit the lane fields after CertVersion so MarshalPayload stays in ascending field-number order, matching what protoc-gen-go would produce and keeping the hand-built expectations in payload_test.go straightforward. Field numbers are the only thing that identifies a lane advert, so a node on this build and one on the previous numbering will each skip the other's adverts as unknown fields and fall back to a single vanilla tunnel.