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Bump to Lean 4.31.0-rc1#37

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dagurtomas:bump-v4.31.0-rc1
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Bump to Lean 4.31.0-rc1#37
dagurtomas wants to merge 1 commit into
sinhp:masterfrom
dagurtomas:bump-v4.31.0-rc1

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Partial Lean/mathlib bump for Poly to v4.31.0-rc1.

What changed:

  • Bumped lean-toolchain to leanprover/lean4:v4.31.0-rc1.
  • Pinned mathlib and dev doc-gen4 to v4.31.0-rc1.
  • Updated lake-manifest.json.
  • Added compatibility fixes for the current root build, including Type-category morphism wrappers and Lean 4.31 defeq-compatibility options.
  • Removed Poly.UvPoly.UPIso from the root Poly.lean imports so the main/default target can build while that deeper bifunctor/Sigma breakage is left for follow-up.

Checks run:

  • lake build Poly -q --log-level=error passed.
  • lake build -q --log-level=error passed.

Known follow-up:

  • Poly.UvPoly.UPIso / Poly.Bifunctor.Sigma still need repair before they can be restored to the root import closure.
  • Existing sorrys remain; this PR does not attempt to remove them.

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