2.2.75

## What's Changed
* [NA] [DOCS] docs: restructure the MCP server docs into five pages by @alexkuzmik in https://github.com/comet-ml/opik/pull/8453
* [OPIK-8366] [BE] fix: correct the spans cutover drivers, runbook and gate against a full rehearsal by @andrescrz in https://github.com/comet-ml/opik/pull/8447
* [issue-8417] [SDK] fix: keep an unanswered user message as its own turn by @feiiiiii5 in https://github.com/comet-ml/opik/pull/8419
* [issue-8408] [SDK] fix: honour LangchainChatModel(track=False) at both provider-response call sites by @feiiiiii5 in https://github.com/comet-ml/opik/pull/8409
* [issue-8398] [SDK] fix: normalise the AnswerRelevance judge score like its sibling parsers by @feiiiiii5 in https://github.com/comet-ml/opik/pull/8400
* [OPIK-8468] [FE] fix: show a failed playground run as an error, not as output by @miguelgrc in https://github.com/comet-ml/opik/pull/8445
* [OPIK-8313] [FE] fix: seed a default prompt when resetting the playground by @andriidudar in https://github.com/comet-ml/opik/pull/8466
* [NA] [SDK] fix: raise MetricComputationError for an infinite KL divergence instead of ZeroDivisionError by @anishmehta24 in https://github.com/comet-ml/opik/pull/8338
* [issue-8360] [SDK] fix: keep streamed tool calls in the aggregated OpenAI response by @feiiiiii5 in https://github.com/comet-ml/opik/pull/8361
* [NA] [SDK] fix: score NaN and Infinity literals as invalid JSON in IsJson by @anishmehta24 in https://github.com/comet-ml/opik/pull/8456
* [OPIK-8274] [BE] perf: stream dataset item inserts via the ClickHouse v2 client by @thiagohora in https://github.com/comet-ml/opik/pull/8465
* [OPIK-7852] [BE] Persist cipx call attribution: trigger, trigger_detail, turn_key, parent_tool_use_id by @aadereiko in https://github.com/comet-ml/opik/pull/7937
* [OPIK-8333] [BE] fix: collapse and bound the optimizations-list tag scan on traces by @andrescrz in https://github.com/comet-ml/opik/pull/8470
* [OPIK-3345] [FE] feat: pin experiments to the top of the experiments table by @andriidudar in https://github.com/comet-ml/opik/pull/8441

## New Contributors
* @anishmehta24 made their first contribution in https://github.com/comet-ml/opik/pull/8338

**Full Changelog**: https://github.com/comet-ml/opik/compare/2.2.74...2.2.75