Implement app deployment improvements

tools/check-tools.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+missing=0
+
+check_required() {
+  local cmd="$1"
+  if command -v "$cmd" >/dev/null 2>&1; then
+    echo "ok: $cmd"
+  else
+    echo "ERROR: missing required tool: $cmd" >&2
+    missing=1
+  fi
+}
+
+check_required kubectl
+check_required helm
+check_required sops
+check_required python3
+
+if command -v kubectl >/dev/null 2>&1; then
+  if kubectl cnpg --help >/dev/null 2>&1; then
+    echo "ok: kubectl cnpg"
+  else
+    echo "WARN: kubectl cnpg plugin is missing; install with: kubectl krew install cnpg" >&2
+    if ! kubectl krew version >/dev/null 2>&1; then
+      echo "WARN: kubectl krew is missing; install krew before using kubectl krew install cnpg" >&2
+    fi
+  fi
+fi
+
+exit "$missing"