feat: claude context editing

relay/channel/aws/adaptor.go

@@ -52,6 +52,10 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 }
 
 func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Header, info *relaycommon.RelayInfo) error {
+	anthropicBeta := c.Request.Header.Get("anthropic-beta")
+	if anthropicBeta != "" {
+		req.Set("anthropic-beta", anthropicBeta)
+	}
 	model_setting.GetClaudeSettings().WriteHeaders(info.OriginModelName, req)
 	return nil
 }