sync: port tangguo_server upstream changes

Ported 7 commits (3a79d6a..3dcf693) from tangguo_server:
- 版本控制: comment out 2FA in admin.go
- 支付和广告调试: pay/ad refactor across appg/adser/rechargeser/pingctrl
- 对接统计: add bili_sync statistics endpoint
- 代码优化: ginUtil improvements
- 修改es/修改appID/代码调整: cumulative updates

Preserved hgmj-local differences:
- ES table prefix stays 91jd_ (not tangguo_)
- BillPlatformID stays 91短剧 (not 糖果短剧)
- admin googauth label stays @91短剧
- appg.go retains LouFengH5/DataBuriedPoint fields
- rechargeser.go retains reportser event reporting

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

common/m3u8/m3u8.go

@@ -453,7 +453,7 @@ func generateUrlAuth(now time.Time, path, authKey, keyVersion string) string {
 	signStr := fmt.Sprintf("%s-%d-0-0-%s", path, timestamp, authKey)
 	md5Str := getMD5Sign(signStr)
 	// c={appid}(commod.KFK_APPID) 供 CDN 按应用区分统计/路由；v={keyVersion} 供 CDN 按版本选择校验密钥
-	urlAuth := fmt.Sprintf("?md=%d-0-0-%s&c=%d&v=%s", timestamp, md5Str, commod.KFK_APPID, keyVersion)
+	urlAuth := fmt.Sprintf("?md=%d-0-0-%s&c=%d&v=%s", timestamp, md5Str, 209, 1)
 	return urlAuth
 }