v2.0.4

## Recommended Upgrade Reasons

### Basic capability update

1. Support for wildcard domain routing with exact domain fallback

  As in the example below, in the previous version, when requesting `www.example.com/abcd` , if no route was found under `www.example.com` , it would directly return a 404; in the current version, if no route is found under `www.example.com` , it will then find route under `*.example.com` .

```yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: wildcard-ingress
spec:
  rules:
  - host: "*.example.com"
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: wildcard-service
            port:
              number: 80
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: exact-ingress
spec:
  rules:
  - host: "www.example.com"
    http:
      paths:
      - path: /abc
        pathType: Exact
        backend:
          service:
            name: exact-service
            port:
              number: 80
```

### ‼️ Important Fixes

1. In the previous 2.x versions, due to issues with the RDS caching strategy, the latest configuration might not have been distributed during high-frequency updates of the ingress. #1547 
3. The previous 2.x version did not automatically configure the number of Envoy worker threads based on the cpu request/limit.



## What's Changed
* AI Agent plugin adds JSON formatting output feature by @xingyunyang01 in https://github.com/alibaba/higress/pull/1374
* feat: Automatically generating markdown documentation for helm charts with helm-docs by @littlejiancc in https://github.com/alibaba/higress/pull/1496
* Optimize AI security guard plugin by @rinfx in https://github.com/alibaba/higress/pull/1473
* fix example sse build error by @007gzs in https://github.com/alibaba/higress/pull/1503
* feat: supports custom prepare build script by @jizhuozhi in https://github.com/alibaba/higress/pull/1490
* Add a quick deployment solution to Alibaba Cloud by @hanans426 in https://github.com/alibaba/higress/pull/1506
* fix workflows build-and-push-wasm-plugin-image by @007gzs in https://github.com/alibaba/higress/pull/1508
* fix compile of wasm cpp plugins by @johnlanni in https://github.com/alibaba/higress/pull/1511
* use the body returned by the ext auth server when auth fails by @johnlanni in https://github.com/alibaba/higress/pull/1510
* feat: implement apiToken failover mechanism by @cr7258 in https://github.com/alibaba/higress/pull/1256
* fix: apitoken failover for coze by @cr7258 in https://github.com/alibaba/higress/pull/1515
* fix: update oidc plugin go.mod dependencies by @Jing-ze in https://github.com/alibaba/higress/pull/1522
* feat: Enhance ai-cache Plugin with Vector Similarity-Based LLM Cache Recall and Multi-DB Support by @EnableAsync in https://github.com/alibaba/higress/pull/1248
* fix: Refresh go.mod and go.sum file contents by @CH3CHO in https://github.com/alibaba/higress/pull/1525
* add model-mapper plugin & optimize model-router plugin by @johnlanni in https://github.com/alibaba/higress/pull/1538
* fix ai fallback by @johnlanni in https://github.com/alibaba/higress/pull/1541
* feat: support custom log by @pepesi in https://github.com/alibaba/higress/pull/1521
* feat: migrate baidu provider to v2 api by @cr7258 in https://github.com/alibaba/higress/pull/1527
* Optimize the overall log output by @johnlanni in https://github.com/alibaba/higress/pull/1549
* set concurrency argument of proxy by cpu limit/request by @johnlanni in https://github.com/alibaba/higress/pull/1552
* fix: 🐛 frontend-gray plugin incorrect URL parsing leads to routing failure. by @heimanba in https://github.com/alibaba/higress/pull/1550
* update ai proxy go mod by @johnlanni in https://github.com/alibaba/higress/pull/1556
* fix: qwen stream issue by @cr7258 in https://github.com/alibaba/higress/pull/1564
* fix xds cache by @johnlanni in https://github.com/alibaba/higress/pull/1559
* fix moonshot usage compatible problem by @rinfx in https://github.com/alibaba/higress/pull/1568
* feat: ai-proxy support dashscope-finance by @pepesi in https://github.com/alibaba/higress/pull/1554
* solve aliyun lvwang content length limit problem by @rinfx in https://github.com/alibaba/higress/pull/1569
* feat: allow cover api-version when use ai-proxy azure provider by @pepesi in https://github.com/alibaba/higress/pull/1535
* extension mechanism for custom logs and span attributes by @rinfx in https://github.com/alibaba/higress/pull/1451
* feat: ai-proxy support custom error handler by cover util.ErrorHandler by @pepesi in https://github.com/alibaba/higress/pull/1537
* rel: Release 2.0.4 by @johnlanni in https://github.com/alibaba/higress/pull/1571

## New Contributors
* @hanans426 made their first contribution in https://github.com/alibaba/higress/pull/1506

**Full Changelog**: https://github.com/alibaba/higress/compare/v2.0.2...v2.0.4