Filter frigate-notify alerts by zone and label

frigate-notify was firing on every MQTT detection event regardless of
zone, causing notification spam. Add filters to match the Frigate
review config: only alert for person/car in the driveway_entrance
zone, and drop all unzoned events.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

argocd/manifests/frigate/configmap-notify.yaml

@@ -23,6 +23,16 @@ data:
       general:
         title: "Frigate Alert"
 
+      zones:
+        unzoned: drop
+        allow:
+          - driveway_entrance
+
+      labels:
+        allow:
+          - person
+          - car
+
       ntfy:
         enabled: true
         server: http://ntfy.ntfy.svc.cluster.local:80