feat: sync deployed v1.0.0-rc.38-custom.42

Sync production source including routing, billing, Astra detection and public uptime. Update custom build instructions and license packaging.

common/audio.go

@@ -5,6 +5,7 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
+	"strings"
 
 	"github.com/abema/go-mp4"
 	"github.com/go-audio/aiff"
@@ -20,6 +21,7 @@ import (
 // 它不再依赖外部的 ffmpeg 或 ffprobe 程序。
 func GetAudioDuration(ctx context.Context, f io.ReadSeeker, ext string) (duration float64, err error) {
 	SysLog(fmt.Sprintf("GetAudioDuration: ext=%s", ext))
+	ext = strings.ToLower(ext)
 	// 根据文件扩展名选择解析器
 	switch ext {
 	case ".mp3":