nx_watch_gate.nx

nx_watch_gate.nx -- gate for the sovereign job/liveness monitor (the anti-flaky-WSL-poll capability). T1 PURE verdict table (deterministic, no clock race): green-class->GREEN, red->RED, live+fresh-> RUNNING, live+stale->STALLED, absent-class->ABSENT. T2 class classifier: GREEN/DONE->green, RED->red, RUNNING/BEAT->live, CUSTOM word->live, empty->malformed. (Custom progress words are LIVENESS -- the old unknown->-1 made nw_status print ABSENT for present keys with phase words like ADMIT-WAIT = fail-loud violation.) T3 store roundtrip: mark RUNNING -> status reads RUNNING (fresh); mark GREEN -> status GREEN; the terminal state is read back from the SOVEREIGN STORE (no WSL, no polling). T4 NEG: an absent id -> ABSENT verdict (no fabricated liveness); ABSENT means MISSING KEY only. T5 custom-phase roundtrip: mark "ADMIT-WAIT" -> status RUNNING (fresh custom word = live). license_tier: ORIGINAL expect_exit: 0