fix various type issues

[mifi]

neglected in #4911:

• bytesTotal can be null (also handle that bug in runtime)
• progress is not a property on the progress object
• use satisfies instead of as
• add todo about broken throttle implementation
• in emitSocketProgress, progressData should not have the FileProgress type, as it is a completely different type (it comes from companion)

[github-actions]

Diff output files

diff --git a/packages/@uppy/core/lib/Uppy.js b/packages/@uppy/core/lib/Uppy.js
index f89267e..978cf7c 100644
--- a/packages/@uppy/core/lib/Uppy.js
+++ b/packages/@uppy/core/lib/Uppy.js
@@ -1283,7 +1283,6 @@ function _addListeners2() {
     });
     const filesState = Object.fromEntries(filesFiltered.map(file => [file.id, {
       progress: {
-        progress: 0,
         uploadStarted: Date.now(),
         uploadComplete: false,
         percentage: 0,
diff --git a/packages/@uppy/utils/lib/getBytesRemaining.js b/packages/@uppy/utils/lib/getBytesRemaining.js
index 8a3ff8a..7c09b31 100644
--- a/packages/@uppy/utils/lib/getBytesRemaining.js
+++ b/packages/@uppy/utils/lib/getBytesRemaining.js
@@ -1,3 +1,4 @@
 export default function getBytesRemaining(fileProgress) {
+  if (fileProgress.bytesTotal == null) return 0;
   return fileProgress.bytesTotal - fileProgress.bytesUploaded;
 }