v0.143.0

## What changed

### 🎉 AI Observability: monitor your LLM and agent workloads

SigNoz now offers dedicated AI Observability for LLM and agent workloads:

- An **Overview** of tokens, cost, latency, and errors across models, providers, and agents
- An **Explorer** to query AI spans by model, provider, agent, and tool
- **Attribute mapping** that normalizes span attributes from different AI frameworks into OpenTelemetry `gen_ai.*` keys
- **Pricing** to set per-model prices and get cost on every LLM span

### 🔐 Login Sessions: opaque tokens by default

Login sessions now use opaque tokens by default, so each user signs in again once. To continue using JWT, set `SIGNOZ_TOKENIZER_PROVIDER=jwt` and `SIGNOZ_TOKENIZER_JWT_SECRET`. With the JWT provider and no secret, SigNoz refuses to start.

Read the [v0.143.0 upgrade guide](https://signoz.io/docs/operate/migration/upgrade-0-143/) before upgrading.

## 🚀 Features

* feat(llm-observability): add ai o11y analytics events (#12952) @tewarig
* feat(storybook): add stories for each existing page (#12734) @H4ad
* feat(llm-observability): move module tabs to RouteTab , add tab icons  & other ui changes (#12762) @tewarig
* feat(authz): enable FGA for cloud integration (#12895) @swapnil-signoz
* feat: add plugin schema for area chart panel (#12635) @namanv3
* feat: support for default attribute mapping (#12809) @nityanandagohain
* feat(quick-filters): AI o11y quick filters (#12788) @tewarig
* feat: add more slack configuration opts in notification channels (#12907) @namanv3
* feat(ai-observability): Trace view changes (#12796) @tewarig
* Feat: How to use doc for sqlcompiler  (#12869) @nikhilmantri0902
* feat(tokenizer): default to the opaque provider (#12896) @therealpandey
* feat: add api to repair malformed channels created via v1 (#12910) @namanv3
* feat(llm-observability): add ai o11y analytics events (#12952) @tewarig

## 🐛 Bug Fixes

* fix(dashboard): don't re-run an errored panel query on scroll back into view (#12958) @ahrefabhi
* fix: failing e2e for llm (#12953) @tewarig
* fix(dashboard): reserve legend rows the grid actually lays out (#12951) @ahrefabhi
* fix(analytics): format segment logger messages before passing to slog (#12950) @therealpandey
* fix(dashboard): restore related values and API search in dynamic variable dropdowns (#12935) @AshwinBhatkal
* fix: AI o11y ui testing bug bash (#12933) @tewarig
* fix(user): revoke sessions when a user is deleted (#12943) @vikrantgupta25
* fix: use db upsert for model pricing (#12942) @nityanandagohain
* fix(tokenizer): accept the previous token pair only within the rotation duration (#12941) @vikrantgupta25
* fix: update attribute mappings for ai (#12925) @nityanandagohain
* fix(charts): stop tooltip labels breaking mid-word (#12894) @ahrefabhi
* fix(legend): isolate legend stacking context (#12924) @ahrefabhi
* fix(tokenizer): require a jwt secret when the provider is jwt (#12899) @therealpandey
* fix(querybuilder): prefer resource over any context for ambiguous filter keys (#12888) @krsoninikhil

## 🧰 Maintenance

* chore: remove ai-o11y ff (#12947) @nityanandagohain
* chore(codeowners): change ownership of storybook (#12949) @H4ad
* chore: add scaffolding tool for feature structure in frontend (#12669) @YounixM
* chore: remove v1 dashboards code from backend (#12932) @namanv3
* chore(logs): delete the old logs explorer (#12930) @aks07
* chore: update dashboard for ai observability (#12875) @nityanandagohain
* chore: use endpoint for fetching data (#12926) @tewarig
* chore: enable ai 011y processors by default (#12912) @nityanandagohain
* test(traces-explorer): flaky "select a view" test on CI (#12931) @aks07
* refactor(traces): delete the old trace explorer code (#12919) @aks07
* refactor(log-details): move infra metrics charts to v5 query_range (#12916) @aks07
* refactor(query-builder): make panel field config actually drive the builder (#12793) @ahrefabhi
* chore: use genai semconv for ai-o11y (#12905) @nityanandagohain
* refactor(prometheus)!: remove the v1 provider and let the provider ow… (#12840) @srikanthccv
* chore: add scaffolding tool for feature structure in frontend (#12669) @YounixM

**Full Changelog**: https://github.com/SigNoz/signoz/compare/v0.142.1...v0.143.0