Experiment cost bug fixed; retention cleanup prioritized

What's Changed

Features

• feat(filters): block filter-sidebar facets unavailable in chart view (LFE-11040) by @nkabardin in https://github.com/langfuse/langfuse/pull/15203
• feat(web): Design system - typography (tokenized text styles) by @nmtrang29 in https://github.com/langfuse/langfuse/pull/15186
• feat(sessions): cleaner more compact view by @nimarb in https://github.com/langfuse/langfuse/pull/15190

Fixes

• perf(worker): prioritize retention cleanup by expiry lag by @sumerman in https://github.com/langfuse/langfuse/pull/15221
• fix(evals): scrollable evaluator list in "Evaluate observations" dialog by @nkabardin in https://github.com/langfuse/langfuse/pull/15217
• fix(dashboards): one-way sizing for home bar widgets to stop chart wobble by @nkabardin in https://github.com/langfuse/langfuse/pull/15220
• fix(experiments): sum item cost across full observation subtree by @wochinge in https://github.com/langfuse/langfuse/pull/15189
• fix(web): render selected cloud region in picker by @wochinge in https://github.com/langfuse/langfuse/pull/15225

Chores

• chore(pricing): resolve gpt-5-chat-latest price, update audit memory by @langfuse-bot in https://github.com/langfuse/langfuse/pull/15178
• chore(clickhouse): propagate query_id to streaming queries and log_comment to all queries (LFE-11043) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15201
• chore(worker): emit per-queue DLQ oldest-job-age gauge (LFE-11064) by @niklassemmler in https://github.com/langfuse/langfuse/pull/15218

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.221.1...v3.222.0