What's Changed
- [OPIK-2108] Improve traces and spans deletion by @BorisTkachenko in #2808
- add general contribution guidelines to CONTRIBUTING.md; by @aadereiko in #2813
- [OPIK-2068] [P SDK] LangGraph Studio Failed to extract token usage from presumably Google LLM langchain run. by @yaricom in #2798
- Update span cost from LiteLLM by @github-actions[bot] in #2817
- Update OpenAPI spec and Fern code by @github-actions[bot] in #2818
- OPIK-1824: Add online thread scoring docs by @thiagohora in #2816
- [NA] Fix failing cost test by @BorisTkachenko in #2820
Full Changelog: 1.8.7...1.8.8