Cloud/remote task creation carries an effort level, and teleport passes a permission mode

Remote session and task creation now threads an effort value through the request: the request body gains effort_level when present, and the creation analytics event records effortLevel (and, on a related path, create_effort_level). The CLI create path also supplies effort plus a resolved permissionMode fallback, and the GitHub-source descriptor gained a pinned flag.

A helper decides whether the chosen effort value even applies to the selected model, returning undefined when it does not, so the field is only forwarded when relevant.