Throttle latestMedia snapshot updates

Add a configurable interval for device latestMedia writes, defaulting to 300 seconds, and pass it to the monitor as an environment variable. Document the setting and bump the chart version.

charts/hub/Chart.yaml

@@ -16,7 +16,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.150.0
+version: 0.151.0
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/hub/README.md

@@ -511,6 +511,7 @@ kerberospipeline:
 | `kerberospipeline.monitor.tag` | The Docker image tag/version. | `"v1.3.9"` |
 | `kerberospipeline.monitor.replicas` | Number of replicas for `kerberospipeline.monitor`. | `1` |
 | `kerberospipeline.monitor.logLevel` | Monitor log level. Set to `debug` for per-event processing checkpoints. | `"info"` |
+| `kerberospipeline.monitor.latestMediaUpdateIntervalSeconds` | Minimum recording-time gap, in seconds, between writes of a device's `latestMedia` snapshot. Reduces writes to the devices collection; the device's latest recording can lag by up to this interval. `0` writes on every recording. | `300` |
 | `kerberospipeline.monitor.resources.requests.memory` | Memory request for `kerberospipeline.monitor`. | `"10Mi"` |
 | `kerberospipeline.monitor.resources.requests.cpu` | CPU request for `kerberospipeline.monitor`. | `"10m"` |
 | `kerberospipeline.sequence.repository` | The [sequencer microservice](https://doc.kerberos.io/hub/pipeline/#sequencer), grouping recordings in chunks/groups. | `"ghcr.io/uug-ai/hub-pipeline-sequence"` |

charts/hub/templates/kerberos-pipeline/pipe-monitor.yaml

@@ -71,6 +71,8 @@ spec:
         # Application
         - name: LOG_LEVEL
           value: "{{ .Values.kerberospipeline.monitor.logLevel }}"
+        - name: LATEST_MEDIA_UPDATE_INTERVAL_SECONDS
+          value: {{ .Values.kerberospipeline.monitor.latestMediaUpdateIntervalSeconds | quote }}
 
         # Queue      
         - name: QUEUE_SYSTEM

charts/hub/values.yaml

@@ -1103,6 +1103,10 @@ kerberospipeline:
     #  - name: extra
     #    mountPath: /data
     logLevel: "info" # possible values: debug, info, warn, error
+    # Minimum recording-time gap (seconds) between two writes of a device's
+    # latestMedia snapshot; 0 writes on every recording. Requires hub-pipeline-monitor
+    # with latest-media throttling (older images ignore it).
+    latestMediaUpdateIntervalSeconds: 300
     resources:
       requests:
         memory: 10Mi