While deploying cluster-observability-operator.v1.3.0 on an OpenShift cluster running 4.18.28, the TroubleshootingPanel UIPlugin fails to reconcile due to incompatible cluster version. However, the current documentation does not clearly state that the Troubleshooting Panel UI plugin is supported only on OpenShift 4.19 and later.

Observed Behavior:

The operator logs show the following error:

Reconciler error {"controller": "uiplugin","error": "plugin \"TroubleshootingPanel\": no compatible image found for cluster version \"v4.18.28\""} 

Expected Behavior:

Documentation should explicitly mention version compatibility, indicating that installing the TroubleshootingPanel plugin on OpenShift 4.18 is not supported.

Steps to Reproduce:

1. Install OpenShift 4.18.28

1. Deploy cluster-observability-operator.v1.3.0

1. Observe operator logs during plugin reconciliation

Update official documentation to include:

• Supported OpenShift versions for TroubleshootingPanel UIPlugin (supported from 4.19+)

• Clarification under compatibility or installation prerequisites

• https://docs.redhat.com/en/documentation/red_hat_openshift_cluster_observability_operator/1-latest/html/ui_plugins_for_red_hat_openshift_cluster_observability_operator/observability-ui-plugins-overview#troubleshooting_observability-ui-plugins-overview