Changes made for Pathfinder V5 PC's.

Scenario Behavior Has differences Writes individual ParameterStore overrides + sets flag No differences Writes only the flag (empty Overrides) No PSL in base file Writes only the flag No selected config Returns null, nothing written Base ConfigurationStore not found Returns null, nothing written Already transferred (flag = true) Returns null, nothing written The "no differences" and "no PSL in base" cases now self-mark as transferred so subsequent updates skip the comparison entirely. The truly missing prerequisite cases (no selected config, no base store) still skip — those will retry on next update, which is correct because they may become valid later.