Add a notice about pending changes need a reload / rebuild

What problem will this feature address?

When adding a new domain, it's not clear that the service needs to be reloaded before changes are picked up.

Describe the solution you'd like

Add a notice like when modifying volumes, e.g. "Please remember to click Redeploy after adding, editing, or deleting a mount to apply the changes".

Describe alternatives you've considered

I assume a number of settings are possible the same way, so might make sense to handle this globally with a floating notice like: "Your configuration has been modified. Redeploy to make changes active."

Additional context

Not a blocker, but some behavior that can be confusing to new users.

Will you send a PR to implement it?

Yes

No file, test, or entry point is named. Start by locating the existing notice for volume changes and the Redeploy action, then determine whether the notice should appear after adding, editing, or deleting a domain or other configuration. Done means users are clearly told to redeploy and the updated configuration becomes active after redeployment.