Artifact publish auto-arms a background "live updates" monitor with no opt-out

Every call to the Artifact tool auto-arms a background task that watches for the artifact being republished elsewhere, even for one-off/throwaway publishes (e.g. a quick visual comparison shown once and never revisited). There's no parameter on the tool to opt out per-call, and the only way to stop an already-armed one is to manually intervene per task. For a session that publishes several short-lived comparison artifacts, this creates avoidable background-task clutter with no way to prevent it at the point of publishing.

Requested fix: a way to opt out of the live-subscription arm on a given Artifact call (or an explicit default of "off unless requested").