Enh: pminfo.lua could be optional

The output from pminfo.lua is not essential to using the archives as it is only used to populate some overall statistics.

It could be made optional to reduce resource usage, particularly on smaller installations.

Start by locating pminfo.lua and the code that invokes it while processing archives. Trace how its output populates overall statistics, then define an optional path that avoids this work while preserving archive use and verify that statistics behavior is clear for both modes.

Written by the indexing model from the issue text.