Fix Julia 1.10 package check by avoiding incompatible 1.12 lockfile

[Copilot]

The Julia 1.10 package check job failed during precompile because CI was using a Manifest.toml generated on Julia 1.12, leading to dependency resolution/precompile incompatibility on 1.10. This change scopes manifest handling so 1.10 resolves a compatible dependency graph from Project.toml.

• CI workflow adjustment (Julia matrix-specific)

  • In .github/workflows/ci.yml, add a conditional step for matrix.julia-version == '1.10' to remove Manifest.toml before Pkg.instantiate().

• Behavioral impact

  • Julia 1.10 no longer consumes a 1.12-generated lockfile.
  • Other matrix entries keep existing behavior unchanged.

- name: Remove Julia 1.12-generated manifest for Julia 1.10
  if: matrix.julia-version == '1.10'
  run: rm -f Manifest.toml