v0.2.31

Changed

• Engine floor moves to kglite 0.20.0 (from 0.19.6, taking 0.19.7 with it).
  This is an engine minor, so the Python requirement is now
  kglite>=0.20.0,<0.21 and the Rust requirements for kglite and
  kglite-mcp-server are 0.20.0. The Rust writer and the Python reader must
  move together: files written by 0.20.0 (.kgl v8) cannot be opened by
  kglite 0.19.x. None of the 0.20.0 breaking changes reaches codingest's code
  or output:
  • The new Value variants and the Value::Duration { nanos } field break
    exhaustive matches, but codingest only matches Value with a wildcard arm,
    so no source edit was needed.
  • datetime(), localtime() and time() return different types, and loader
    on_invalid defaults to 'error'. The builder writes no temporal values
    and does not use the bulk loaders.
  • The workspace compiles unchanged and the frozen parity goldens are
    unchanged.