fix(s3): add fallback for unrecognized MIME types in uploadSimple

getExtension() can return undefined for unrecognized MIME types.
Added fallback chain: try URL extension, then default to 'bin'.

Author: kaumudpa

libraries/nestjs-libraries/src/upload/s3.storage.ts

@@ -73,7 +73,8 @@ export class S3Storage implements IUploadProvider {
     const contentType =
       loadImage?.headers?.get('content-type') ||
       loadImage?.headers?.get('Content-Type');
-    const extension = getExtension(contentType)!;
+    // Fallback to 'bin' if MIME type is unrecognized, or try to extract from URL
+    const extension = getExtension(contentType) || path.split('.').pop()?.split('?')[0] || 'bin';
     const id = makeId(10);
     const datePath = this.getDatePath();
     const key = `${datePath}/${id}.${extension}`;