fix(dashboard-agent): an inaccessible scope never stops the mandatory sweep

A 403 (no personal dev env in a sibling project) was ending the sweep
early. Factored the repeated sweep imperative into one shared const
across get_run/get_error/get_queue/correlate_version's descriptions
and the system-prompt bullet, both now saying inaccessible scopes are
skipped, not stopped on, and reported alongside what was checked.

Author: kathiekiwi