chore(ci): remove python 3.10 from test matrices

[hoehner]

Closes #436.

Removes 3.10 from the build-check-test matrix and bumps the latest-deps-test lower bound to 3.11, making 3.11 the lowest CI-tested version. CI-only by design: requires-python floors stay >=3.10, so 3.10 remains claimed but untested until support is dropped for real (breaking change, separate work).

Stacked on #435 (both touch the same matrix block); retargets main when that merges. Remove the branch-protection required checks for the (..., 3.10) job names alongside the runner-label renames from #435.

[greptile-apps]

Greptile Summary

This PR removes Python 3.10 from the CI test matrices while intentionally leaving package compatibility declarations unchanged.

• Changes the primary build, check, and test matrix to Python 3.11–3.14.
• Changes the latest-dependencies boundary matrix to Python 3.11 and 3.14.
• Clarifies that the latest-dependencies matrix represents the CI-tested range rather than the declared support range.

Confidence Score: 5/5

The PR appears safe to merge because the workflow changes consistently implement the explicitly documented reduction in CI coverage.

Both affected matrices now use Python 3.11 as their lowest tested interpreter, and the remaining Python 3.10 compatibility claim is explicitly identified as intentional temporary policy rather than an accidental workflow omission.

Important Files Changed

Filename	Overview
.github/workflows/build-check-test.yml	Removes Python 3.10 from the cross-platform test matrix as intended.
.github/workflows/latest-deps-test.yml	Raises the oldest latest-dependencies test target to Python 3.11 and updates the matrix comment consistently.

_{Reviews (1): Last reviewed commit: "chore(ci): remove python 3.10 from test ..." | Re-trigger Greptile}