[PB-6899]: settle every queued file so folder uploads never hang

[terrerox]

Description

Uploading a folder with many files could stay stuck at "Processing" / 100% forever with files missing (e.g. 998/1000), usually after a 502 on POST /drive/files in the console.

Root cause: the UploadManager queue worker ran an un-awaited async upload(). Any throw or rejection before or inside the uploadFile chain (e.g. IndexedDB getUploadState on the retry after a 502, or an undefined rejection value) escaped, next was never called and the folder's Promise.all never settled. A throwing success listener could also re-upload the file and call next twice.

Changes:

• Uploads run as a single awaited chain: processFile → uploadWithRetries → uploadAttempt, with a top-level .catch and a callOnce guard so next is always called exactly once.
• The retry is awaited and error classification no longer throws on unexpected rejection values.
• Success listeners are isolated (runListener); floating setUploadState / removeUploadState promises now have a .catch.

Behaviour change: a throwing success listener is now reported and the file is kept as uploaded (previously it was re-uploaded and then marked as failed).

Checklist

• Changes have been tested locally.
• Unit tests have been written or updated as necessary.
• The code adheres to the repository's coding standards.
• Relevant documentation has been added or updated.
• No new warnings or errors have been introduced.
• SonarCloud issues have been reviewed and addressed.
• QA Passed

[cloudflare-workers-and-pages]

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Preview URL:	https://98681b3c.drive-web.pages.dev
Branch Preview URL:	https://fix-folder-upload-stuck-proc.drive-web.pages.dev

View logs

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
85.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud