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ruv
6ff155a232
Closes WITNESS-LOG-110 §A0.11 wiring gap. Adds a separate 32-byte UDP packet (magic 0xC511A110, distinct from the CSI frame magic 0xC5110001) carrying: [0..3] magic 0xC511A110 (LE u32) — CSI-ADR-110 sync packet [4] node_id [5] proto version (0x01) [6] flags: bit0=is_leader, bit1=is_valid, bit2=smoothed_used [7] reserved [8..15] local esp_timer_get_time() (LE u64) [16..23] mesh-aligned epoch (LE u64) = local + EMA-smoothed offset [24..27] high-water sequence number (LE u32) for pairing with CSI frames [28..31] reserved (room for leader_id low32 in a follow-up) Emitted once per 20 CSI frames (≈ 1 Hz at the 20 Hz send-rate gate). Same stream_sender UDP socket as CSI frames — host dispatches by first 4 bytes of each datagram. Backwards compatible: aggregators that don't know about the new magic ignore it (sync packets won't match the CSI parser's magic check, so they're dropped harmlessly by existing receivers). New aggregators pair (node_id, sequence) across the two packet streams to align CSI frames to mesh time. Sets us up for downstream ADR-029/030 multistatic CSI fusion: with the host now able to recover the mesh-aligned epoch from each frame's sequence number, frames from multiple boards can be ordered + fused on a common timeline. Build evidence: C6 image 1019 KB (+1 KB vs v0.6.8 no-sync), 45 % partition slack unchanged. Host-side parser update is a follow-up. Co-Authored-By: claude-flow <ruv@ruv.net>