feat: unify param/header overrides with retry-aware conditions and flexible header operations

controller/channel-test.go

@@ -385,7 +385,7 @@ func testChannel(channel *model.Channel, testModel string, endpointType string,
 	//}
 
 	if len(info.ParamOverride) > 0 {
-		jsonData, err = relaycommon.ApplyParamOverride(jsonData, info.ParamOverride, relaycommon.BuildParamOverrideContext(info))
+		jsonData, err = relaycommon.ApplyParamOverrideWithRelayInfo(jsonData, info)
 		if err != nil {
 			if fixedErr, ok := relaycommon.AsParamOverrideReturnError(err); ok {
 				return testResult{