fix: 416 HTTP error deleting local files fix

[Moyasee]

When submitting this pull request, I confirm the following (please check the boxes):

• I have read the Hydra documentation.
• I have checked that there are no duplicate pull requests related to this request.
• I have considered, and confirm that this submission is valuable to others.
• I accept that this submission may not be used and the pull request may be closed at the discretion of the maintainers.

Fill in the PR content:

Updated src/main/services/download/js-http-downloader.ts so HTTP 416 no longer deletes the local file and restarts from 0.
New behavior on 416 during resume:
If server Content-Range says local size already equals remote total, it marks download as complete.
Otherwise, it throws an error and keeps the local file intact (no forced zero restart).
Added a helper to parse total size from Content-Range: bytes */ for this decision path.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud