feat: add retry-aware param override with return_error and prune_objects

relay/chat_completions_via_responses.go

@@ -84,7 +84,7 @@ func chatCompletionsViaResponses(c *gin.Context, info *relaycommon.RelayInfo, ad
 	if len(info.ParamOverride) > 0 {
 		chatJSON, err = relaycommon.ApplyParamOverride(chatJSON, info.ParamOverride, overrideCtx)
 		if err != nil {
-			return nil, types.NewError(err, types.ErrorCodeChannelParamOverrideInvalid, types.ErrOptionWithSkipRetry())
+			return nil, newAPIErrorFromParamOverride(err)
 		}
 	}