nx_iot_clock_master_test.nx

nx_iot_clock_master_test.nx -- end-to-end smoke for the clock- master atomic-scene scheduler. S-class invariants exercised: S0 -- determinism: same input produces same drained order S3 -- atomicity: drain_due returns ALL entries due in one call S7 -- sealed-enum verdicts: every operation reports a verdict Coverage: - tick verdict validity gate (full sealed enum) - init writes a coherent state - tick_advance: no-advance when wall-ms hasn't moved - tick_advance: single-tick on exactly period_ms elapsed - tick_advance: multi-tick on multiple periods elapsed - schedule: into empty queue lands at pos 0 - schedule: sorted-by-target_tick insertion preserves order - schedule: FIFO within equal target_tick - schedule: overflow when queue saturated - drain_due: nothing when no entries due - drain_due: all-or-nothing atomic dispatch in target-tick order - drain_due: surviving entries shift left correctly - cancel: removes a specific entry by id - cancel: not-found verdict on miss - peek_next: empty queue returns -1 + NOT_FOUND - peek_next: populated queue returns head target_tick expect_exit: 0 license_tier: ORIGINAL