Fix frigate-notify config: webapi polling, dedup, hi-res snapshots

- Switch from MQTT to webapi polling (v0.5.4 requires one, not both)
- Set poll interval to 15s for responsive alerts
- Enable notify_once to deduplicate per-event notifications
- Set nosnap: drop to skip events without snapshots
- Enable snap_hires for recording-stream quality snapshots
- Remove unused MQTT broker config

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

argocd/manifests/frigate/configmap-notify.yaml

@@ -11,17 +11,17 @@ data:
 
       webapi:
         enabled: true
+        interval: 15
 
       mqtt:
-        enabled: true
-        server: mosquitto.mqtt.svc.cluster.local
-        port: 1883
-        clientid: frigate-notify
-        topic_prefix: frigate
+        enabled: false
 
     alerts:
       general:
         title: "Frigate Alert"
+        nosnap: drop
+        snap_hires: true
+        notify_once: true
 
       zones:
         unzoned: drop

docs/changelog.d/fix-frigate-notify-config.bugfix.md

@@ -0,0 +1 @@
+Fix frigate-notify notification pipeline: switch to webapi polling, enable dedup, drop events without snapshots, use hi-res snapshots