ci: Fix python versions on release-checks

[aborgna-q]

• Use python 3.10 when testing the lowest possible dependencies (fixes an error with pytket not being found for py3.14)
• Get the cached tket-c-api before calling maturin build

CI run: https://github.com/CQCL/tket2/actions/runs/19262256076 ✅

[cqc-alec]

Do you know why the "Release Checks" workflow was skipped? Looks like it should run for every PR to main?

[aborgna-q]

We only run it for tket-py release PRs (#976).

We are checking that the tket version in main works with the latest releases of tket-exts and tket-eccs.
That's not always the case, as we may have unpublished breaking changes to those.

We only need to check for that when actually preparing to make a release.

[cqc-alec]

But currently (since #1016 ) it looks like it should run on all PRs? Confused.

[cqc-alec]

Still puzzled why this isn't working with python 3.14.

[aborgna-q]

But currently (since #1016 ) it looks like it should run on all PRs? Confused.

The actual step has an if condition, because we cannot filter by PR branch name on the triggers.

tket2/.github/workflows/release-checks.yml

Line 30 in 92cc39d

if: ${{ github.event_name == 'workflow_dispatch' || github.head_ref == 'release-please--branches--main--components--tket-py' }}

Still puzzled why this isn't working with python 3.14.

The lower check uses the minimum bounds for each direct dependency, so for pytket it was fetching 1.34.0, which didn't have abi3 or 3.14 wheels.

https://github.com/CQCL/tket2/actions/runs/19241911253/job/55006437818?pr=1238#step:6:57

[cqc-alec]

Ah I see, thanks.