Add Immich user and library metrics dashboard

apps/immich-postgresql/scripts/ensure-metrics-view.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ "$(kubectl config current-context)" != "kubernetes-admin@kubernetes" ]]; then
+  echo "Refusing to modify Immich PostgreSQL outside the homelab context." >&2
+  exit 1
+fi
+
+app_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+primary="$(kubectl --namespace immich get pods \
+  --selector='cnpg.io/cluster=immich-postgresql,cnpg.io/instanceRole=primary' \
+  --output=jsonpath='{.items[0].metadata.name}')"
+if [[ -z "${primary}" ]]; then
+  echo "No Immich PostgreSQL primary is available." >&2
+  exit 1
+fi
+
+kubectl --namespace immich exec -i "${primary}" --container postgres -- \
+  psql --set=ON_ERROR_STOP=1 --username=postgres --dbname=immich \
+  < "${app_dir}/metrics-view.sql"