chore(scripts): add compose, k3s, backup, and media helpers

Automate image load, Helm install, database backup, and sample video regeneration.

scripts/helm-k3s.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Install / upgrade Pargar on local k3s with the k3s values profile.
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$ROOT"
+
+NS="${NS:-pargar}"
+RELEASE="${RELEASE:-pargar}"
+
+helm upgrade --install "$RELEASE" ./deploy/helm/pargar \
+  --namespace "$NS" \
+  --create-namespace \
+  -f ./deploy/helm/pargar/values-k3s.yaml \
+  "$@"
+
+echo
+echo "Add hosts entry if needed:  <node-ip>  pargar.local"
+echo "Health: curl -k https://pargar.local/api/health"