fix: change health_ok to status

docs/THRESHOLD_ALERTING.md

@@ -268,9 +268,9 @@ The default threshold is equivalent to:
 zfs_monitor:
   pools:
     '*':
-      health_ok:
+      status:
         critical: 1
-        operator: "<"
+        operator: ">"
         hysteresis: 0.0
         display: "ZFS pool {pool_name} is {health}"
 ```
@@ -285,7 +285,7 @@ zfs_monitor:
   pools:
     # Suppress health alerts for a scratch pool (not mission-critical)
     scratch:
-      health_ok:
+      status:
         enabled: false
 
     # Capacity threshold for a specific pool
@@ -297,12 +297,12 @@ zfs_monitor:
         hysteresis: 0.05
 ```
 
-**Alert state paths** follow the pattern `zfs_monitor.<pool_name>.health_ok`,
+**Alert state paths** follow the pattern `zfs_monitor.<pool_name>.status`,
 so acknowledgements and silences target individual pools:
 
 ```
-zfs_monitor.tank.health_ok
-zfs_monitor.backup.health_ok
+zfs_monitor.tank.status
+zfs_monitor.backup.status
 ```
 
 ### Network Monitor