chore: release 2.7.1

[vvillait88]

Summary

Releases 2.7.1, carrying everything merged since 2.7.0:

• deprecation notes on refresh and on the create_session address and operator_token arguments, which the API ignores (docs: deprecate request options the API ignores #101)
• X-Quota-Reset documented as a UTC date rather than a timestamp (docs: X-Quota-Reset is a UTC date, not a timestamp #100)
• docstring and README cleanup (docs: remove em-dashes from docs, docstrings and tests #99)
• the uv prerelease rule matching python-commerce (uv: prerelease if-necessary, matching python-commerce #98) and a dependency sweep, uv 0.12.23 (chore: dependency sweep (uv 0.12.23) #97)

Worked with: Varun.

Out of scope: no runtime behavior changes; the deprecated options keep working as before.

Type of change

• Bug fix (no breaking change)
• New feature (no breaking change)
• Breaking change (existing callers must update)
• Docs, tests, or internal maintenance only

Public API

none. The deprecations are docstring notes only; signatures and wire formats are unchanged.

Test plan

ruff check, ruff format --check, ty check and pytest (177 passed, 2 skipped, 99.82% coverage) pass locally on this branch.

Checklist

• Tests cover the new behavior, and the suite passes locally
• Lint, format, and type checks pass
• Docs and README examples updated if the public surface changed
• No secrets, credentials, or personal data in the diff or the tests