Refactorings to support index scans for pg catalog tables #3190
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…mysql-server into zachmu/index-scans-pgcatalog
This was referenced Sep 9, 2025
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This PR adds new interfaces to allow different expressions types to participate in the standard index costing process, which results in a RangeCollection. Also plumbs additional type info through so that types with a more precise conversion process can participate as well.