Dark theme redesigned with elevation and semantic status…

What's Changed

feat(blobstorage): disable export on deterministic customer-config faults by @niklassemmler in https://github.com/langfuse/langfuse/pull/14628
feat(web): dark theme revamp — surface elevation, text hierarchy, semantic status colors by @nmtrang29 in https://github.com/langfuse/langfuse/pull/14873
feat(web): system table view preset category chips by @nmtrang29 in https://github.com/langfuse/langfuse/pull/14774

fix(evals): stop offering new trace-level evals to v4-toggle cohort on Cloud by @marliessophie in https://github.com/langfuse/langfuse/pull/14924
fix(datasets): show empty state for filtered run compare by @marliessophie in https://github.com/langfuse/langfuse/pull/14893
fix(otel): map input/output from gen_ai.client.inference.operation.details span events by @hassiebp in https://github.com/langfuse/langfuse/pull/14930

chore: pipeline blob storage cleanup deletes and batch tombstone inserts by @sumerman in https://github.com/langfuse/langfuse/pull/14910
docs(readme): add hiring message by @jannikmaierhoefer in https://github.com/langfuse/langfuse/pull/14919
refactor(events): update SDK metadata extraction for OTel compatibility by @marliessophie in https://github.com/langfuse/langfuse/pull/14917
chore(fetch-llm-completion): add remaining AI SDK adapters by @hassiebp in https://github.com/langfuse/langfuse/pull/14854
chore(shared): document ms-aligned start_time assumption in v2 observations cursor (LFE-10405) by @niklassemmler in https://github.com/langfuse/langfuse/pull/14926

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.208.0...v3.209.0