SAM Doctor v0.7.3

SAM Doctor v0.7.3

SAM Doctor v0.7.3 packages Marketplace metadata with the composite GitHub
Action. The listing uses the action's existing description plus an activity
icon and yellow branding, while keeping its redacted summaries and optional
failure gating unchanged.

This release also refreshes the diagnostic issue form so contributors provide
their installed version rather than copying a stale placeholder.