Alignment revision before the job; point or model edits invalidate it.
Host revision for source data, style, layers, area, resolution and query region.
Controller document identity at job start.
Normalized source-image identity; empty if no image was loaded.
Capture of the controller and host configuration before reference acquisition. Retain with the resulting snapshot/candidates; do not regenerate at application time, since that would conceal intervening edits. This is a revision guard, not an authorization token, and contains no credentials.