What's Changed
* feat(api): add countObservations to metrics endpoint, model nullable by marcklingen in https://github.com/langfuse/langfuse/pull/1779
* fix(api): support special characters in dataset name and run name by marcklingen in https://github.com/langfuse/langfuse/pull/1762
**Full Changelog**: https://github.com/langfuse/langfuse/compare/v2.30.0...v2.30.1