nx_snapfeed_gate.nx

nx_snapfeed_gate.nx -- PURE isolation gate for the /proc + supervisor.log parse tier (nx_snapfeed). Proves the two hard-won correctness lessons with fixtures shaped like the real nishihost ground truth: - robust /proc/<pid>/stat parse survives a comm with SPACES AND PARENS (T2) - a service is matched by its FULL cmdline, and a 15-char-truncated comm SILENTLY MISSES it (T4 vs T5 NEG) - crash-loop restart counting from the supervisor.log window (T6/T7) + a NEG (T8) - session-leader vs child distinction at the source data (T1 leader, T3 keeper child) = the lineage fix's input No IO/socket/exec. GREEN iff every assertion holds. Sovereign: nx_snapfeed + nx_syscalls. license_tier: ORIGINAL