nx_stackaudit_targets.nx

nx_stackaudit_targets.nx -- THE LOOP-CLOSER: the stack audit's RED/below-floor rungs become ranked work in the autonomous loop's assignment_queue.tsv. Mirrors nx_ecomat_target_emit exactly (shared sax_emit_targets_core, rt_lock-protected, IDEMPOTENT: a rung already queued as STACK-<name> is not re-emitted; a healthy rung writes a STACK-DONE marker that nx_reconcile flips the row on). So the audit stops being a report and starts DRIVING the build -- measured, never asserted. license_tier: ORIGINAL expect_exit: 0