nx_relchan_gate.nx

nx_relchan_gate.nx -- proves + MEASURES the sovereign reliable/ordered/exactly-once event channel (nx_relchan) over a LOSSY link (drops both events AND acks). Critical game events survive packet loss without being lost or double-applied -- the correctness the position stream doesn't need but captures do. 1) all N events delivered EXACTLY ONCE, IN ORDER, despite event+ack loss (converges via retransmit) 2) idempotent (neg): replaying an already-delivered event delivers nothing more 3) honest no-fake (neg): under TOTAL loss nothing is delivered (no fabricated delivery) 4) ack advances the window: a cumulative ack stops retransmission of acked events Built nx_cc_sovereign -> nxasm_x86 (no gcc, no .sh). license_tier: ORIGINAL