backend-common: Move definition of etag property inside constructor

packages/backend-common/src/reading/tree/TarArchiveResponse.ts

@@ -36,13 +36,12 @@ const pipeline = promisify(pipelineCb);
  */
 export class TarArchiveResponse implements ReadTreeResponse {
   private read = false;
-  public readonly etag;
 
   constructor(
     private readonly stream: Readable,
     private readonly subPath: string,
     private readonly workDir: string,
-    etag: string,
+    public readonly etag: string,
     private readonly filter?: (path: string) => boolean,
   ) {
     if (subPath) {

packages/backend-common/src/reading/tree/ZipArchiveResponse.ts

@@ -30,13 +30,12 @@ import {
  */
 export class ZipArchiveResponse implements ReadTreeResponse {
   private read = false;
-  public readonly etag;
 
   constructor(
     private readonly stream: Readable,
     private readonly subPath: string,
     private readonly workDir: string,
-    etag: string,
+    public readonly etag: string,
     private readonly filter?: (path: string) => boolean,
   ) {
     if (subPath) {