Refactor PCM conversion to return result and sample rate

Updated the FFmpeg adapter interfaces and implementations so that PCM conversion methods now return an object containing the conversion result and sample rate, instead of a Buffer. Adjusted audio processing logic to accommodate this change and improved error logging. Updated native ffmpeg addon binaries.

src/common/ffmpeg.ts

@@ -93,7 +93,7 @@ export class FFmpegService {
     /**
      * 转换为 PCM 格式
      */
-    public static async convert(filePath: string, pcmPath: string): Promise<Buffer> {
+    public static async convert(filePath: string, pcmPath: string): Promise<{ result: boolean, sampleRate: number }> {
         const adapter = await this.getAdapter();
         return adapter.convertToPCM(filePath, pcmPath);
     }