instagram: new extraction method

new extraction method first tries to fetch content directly from instagram graphql API, fallback to html embed page. in case every method fail, rely on 3rd party

util/http.go

@@ -2,7 +2,6 @@ package util
 
 import (
 	"bytes"
-	"encoding/json"
 	"fmt"
 	"govd/config"
 	"govd/models"
@@ -14,6 +13,8 @@ import (
 	"strings"
 	"sync"
 	"time"
+
+	"github.com/bytedance/sonic"
 )
 
 var (
@@ -235,7 +236,7 @@ func parseProxyResponse(proxyResp *http.Response, originalReq *http.Request) (*h
 	}
 
 	var response models.ProxyResponse
-	if err := json.Unmarshal(body, &response); err != nil {
+	if err := sonic.ConfigFastest.Unmarshal(body, &response); err != nil {
 		return nil, fmt.Errorf("error parsing proxy response: %w", err)
 	}