v4.6.0b1

What's Changed

• chore: improve agent development setup by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1642
• feat(ci): add RunnerContext and RegressionError for experiment GH action by @wochinge in https://github.com/langfuse/langfuse-python/pull/1635

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v4.5.1...v4.6.0b1