Adds envoy-ai-gateway conformance report (#1320)

* Adds envoy-ai-gateway conformance report

Signed-off-by: bitliu <[email protected]>

* 更新 README.md

Co-authored-by: Arko Dasgupta <[email protected]>

---------

Signed-off-by: bitliu <[email protected]>
Co-authored-by: Arko Dasgupta <[email protected]>

Author: Xunzhuo

conformance/reports/v0.5.1/gateway/envoy-ai-gateway/README.md

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+# Envoy AI Gateway
+
+## Table of Contents
+
+| Extension Version Tested | Profile Tested | Implementation Version | Mode    | Report                                                                |
+|--------------------------|----------------|------------------------|---------|-----------------------------------------------------------------------|
+| v0.5.1                   | Gateway        | [latest](https://github.com/envoyproxy/ai-gateway)                  | default | [Conformance report](./aigw-latest-report.yaml) |
+| ...                      | ...            | ...                    | ...     | ...                                                                   |
+
+## Reproduce
+
+This is a mirror of the envoy ai gateway [conformance e2e test](https://github.com/envoyproxy/ai-gateway/blob/main/.github/workflows/build_and_test.yaml), which includes the conformance tests for the Gateway API and Inference Extension.
+
+### Prerequisites
+
+In order to run the conformance tests, the following prerequisites must be met:
+
+- The [kubectl](https://kubernetes.io/docs/tasks/tools/) command-line tool installed and configured for the active cluster context.
+- The [helm](https://github.com/helm/helm),[kind](https://kind.sigs.k8s.io), [git](https://git-scm.com/downloads), and [make](https://www.gnu.org/software/make/) command-line tools installed.
+
+### Steps
+
+1. Clone the envoy-ai-gateway repository and checkout the release:
+
+   ```sh
+   git clone https://github.com/envoyproxy/ai-gateway.git && cd ai-gateway
+   ```
+
+2. Running the Gateway API Inference Extension conformance tests:
+
+   ```sh
+      make test-e2e GO_TEST_ARGS="-run TestGatewayAPIInferenceExtension -v" EG_VERSION=v0.0.0-latest TEST_KEEP_CLUSTER=true
+   ```

conformance/reports/v0.5.1/gateway/envoy-ai-gateway/aigw-latest-report.yaml

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+GatewayAPIInferenceExtensionVersion: v0.5.1
+apiVersion: gateway.networking.k8s.io/v1
+date: "2025-08-15T14:10:31-09:00"
+gatewayAPIChannel: experimental
+gatewayAPIVersion: v1.3.0
+implementation:
+  contact:
+  - github.com/envoyproxy/ai-gateway/issues/new/choose
+  organization: envoyproxy
+  project: envoy-ai-gateway
+  url: github.com/envoyproxy/ai-gateway
+  version: latest
+kind: ConformanceReport
+mode: default
+profiles:
+- core:
+    result: success
+    statistics:
+      Failed: 0
+      Passed: 9
+      Skipped: 0
+  name: Gateway
+  summary: Core tests succeeded.