fix: change health_ok to status

hbd/config_thresholds_example.yaml

@@ -139,13 +139,13 @@ thresholds:
   # ----------------------------------------------------------------------------
   zfs_monitor:
     # Pool health check — built-in default; shown here for reference/override.
-    # health_ok is 1 (ONLINE) or 0 (DEGRADED, SUSPENDED, FAULTED, UNAVAIL…).
+    # status is 0 (ONLINE) or 1 (DEGRADED) or 2 (SUSPENDED, FAULTED, UNAVAIL…).
     # Use '*' to apply the same rule to every pool, or name a specific pool.
     pools:
       '*':
-        health_ok:
-          critical: 1           # Alert CRITICAL when pool is not ONLINE
-          operator: "<"
+        status:
+          critical: 0           # Alert CRITICAL when pool is not ONLINE
+          operator: ">"
           hysteresis: 0.0       # No hysteresis — a degraded pool is always critical
           display: "ZFS pool {pool_name} is {health}"