Cron: enforce cron-owned delivery contract (#40998)

Merged via squash.

Prepared head SHA: 5877389e33d5b3a518925b5793a6f6294cb3fb3d
Co-authored-by: mbelinky <132747814+mbelinky@users.noreply.github.com>
Co-authored-by: mbelinky <132747814+mbelinky@users.noreply.github.com>
Reviewed-by: @mbelinky

src/cli/cron-cli/register.ts

@@ -16,7 +16,7 @@ export function registerCronCli(program: Command) {
     .addHelpText(
       "after",
       () =>
-        `\n${theme.muted("Docs:")} ${formatDocsLink("/cli/cron", "docs.openclaw.ai/cli/cron")}\n`,
+        `\n${theme.muted("Docs:")} ${formatDocsLink("/cli/cron", "docs.openclaw.ai/cli/cron")}\n${theme.muted("Upgrade tip:")} run \`openclaw doctor --fix\` to normalize legacy cron job storage.\n`,
     );
 
   registerCronStatusCommand(cron);