The profile whose credentials to use.
The bucket containing the upload.
The AWS multipart upload ID to abort.
The S3 object key.
Whether this upload was started by brows3r.
OptionalconfirmedUnknown: booleanMust be true when source is "unknown".
Abort a single in-progress multipart upload.
If
sourceis"unknown"andconfirmedUnknownis nottrue, the backend returns aValidationerror — the frontend must show an explicit confirmation dialog before calling this again withconfirmedUnknown: true.