chore: vendor sglang v0.5.10 snapshot

third_party/sglang/sgl-model-gateway/examples/wasm/wasm-guest-auth/README.md

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+# WASM Auth Example for sgl-model-gateway
+
+This example demonstrates API key authentication middleware for sgl-model-gateway using the WebAssembly Component Model.
+
+## Overview
+
+This middleware validates API keys for requests to `/api` and `/v1` paths:
+
+- Supports `Authorization: Bearer <key>` header
+- Supports `Authorization: ApiKey <key>` header
+- Supports `x-api-key` header
+- Returns `401 Unauthorized` for missing or invalid keys
+
+**Default API Key**: `secret-api-key-12345`
+
+## Quick Start
+
+### Build and Deploy
+
+```bash
+# Build
+cd examples/wasm-guest-auth
+./build.sh
+
+# Deploy (replace file_path with actual path)
+curl -X POST http://localhost:3000/wasm \
+  -H "Content-Type: application/json" \
+  -d '{
+    "modules": [{
+      "name": "auth-middleware",
+      "file_path": "/absolute/path/to/wasm_guest_auth.component.wasm",
+      "module_type": "Middleware",
+      "attach_points": [{"Middleware": "OnRequest"}]
+    }]
+  }'
+```
+
+### Customization
+
+Modify `EXPECTED_API_KEY` in `src/lib.rs`:
+
+```rust
+const EXPECTED_API_KEY: &str = "your-secret-key";
+```
+
+## Testing
+
+```bash
+# Test unauthorized (returns 401)
+curl -v http://localhost:3000/api/test
+
+# Test authorized (passes)
+curl -v http://localhost:3000/api/test \
+  -H "Authorization: Bearer secret-api-key-12345"
+```
+
+## Troubleshooting
+
+- Verify API key matches `EXPECTED_API_KEY` in code
+- Check request header format and path (`/api` or `/v1`)
+- Verify module is attached to `OnRequest` phase
+- Check router logs for errors