Cache bound vars in where clause

[cap10morgan]

No description provided.

[cap10morgan]

Current dependencies on/for this PR:

• main
  • PR Add a pending test for error thrown on unbound var in txn #676
    • PR Fix catch* indentation in f.d.q.exec.where #677
      • PR Fix some more code formatting issues in a few namespaces #680
        • PR Format & refactor f.d.q.fql.parse #689
          • PR Format code in f.d.q.exec.where ns #690
            • PR Format code in f.d.transact.transact-test ns #691
              • PR Throw error when unbound var used in insert or delete #692
        • PR Throw error if unbound var appears in insert clause #681
          • PR Cache bound vars in where clause #683 👈
          • PR Add caching to where/bound-variable? #682
      • PR Throw error if any vars are unbound in txn insert #678

This stack of pull requests is managed by Graphite.

[cap10morgan]

Going to explore a different direction for this, so hold off on reviewing for now.