log when tus uploaded size differs

[mifi]

for debugging purposes

[github-actions]

Diff output files

diff --git a/packages/@uppy/companion/lib/server/Uploader.js b/packages/@uppy/companion/lib/server/Uploader.js
index ee2d553..bc239e6 100644
--- a/packages/@uppy/companion/lib/server/Uploader.js
+++ b/packages/@uppy/companion/lib/server/Uploader.js
@@ -448,7 +448,7 @@ class Uploader {
     // chunkSize needs to be a finite value if the stream is not a file stream (fs.createReadStream)
     // https://github.com/tus/tus-js-client/blob/4479b78032937ac14da9b0542e489ac6fe7e0bc7/lib/node/fileReader.js#L50
     const chunkSize = this.options.chunkSize || (isFileStream ? Infinity : 50e6);
-    return new Promise((resolve, reject) => {
+    const tusRet = await new Promise((resolve, reject) => {
       const tusOptions = {
         endpoint: this.options.endpoint,
         uploadUrl: this.options.uploadUrl,
@@ -503,6 +503,15 @@ class Uploader {
       this.tus = new tus.Upload(stream, tusOptions);
       this.tus.start();
     });
+    // @ts-ignore
+    if (this.size != null && this.tus._size !== this.size) {
+      // @ts-ignore
+      logger.warn(
+        `Tus uploaded size ${this.tus._size} different from reported URL size ${this.size}`,
+        "upload.tus.mismatch.error",
+      );
+    }
+    return tusRet;
   }
   async #uploadMultipart(stream) {
     if (!this.options.endpoint) {