v4.3.0rc1

What's Changed

• feat(api): update API spec from langfuse/langfuse 07cae52 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1617
• chore(deps): bump actions/github-script from 8.0.0 to 9.0.0 in the github-actions group by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1616
• refactor(tests): split suites by execution level and speed up CI by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1609
• ci: add 7-day dependabot cooldown by @wochinge in https://github.com/langfuse/langfuse-python/pull/1619
• ci: harden GitHub Actions workflows with zizmor by @wochinge in https://github.com/langfuse/langfuse-python/pull/1623

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.2.0...v4.3.0rc1