feat(deploy): notify clients of new releases

lib/deployment/version.ts

@@ -0,0 +1,15 @@
+export function normalizeDeploymentId(
+  value: string | null | undefined,
+): string | null {
+  const normalized = value?.trim();
+  return normalized ? normalized : null;
+}
+
+export function hasDeploymentChanged(
+  current: string | null | undefined,
+  next: string | null | undefined,
+): boolean {
+  const currentId = normalizeDeploymentId(current);
+  const nextId = normalizeDeploymentId(next);
+  return currentId !== null && nextId !== null && currentId !== nextId;
+}