[FEATURE] - PR6 : Web samples

[pulk17]

[FEATURE]

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The sample library and uploads. Depends on #1200.

What's here
Samples with their parsed MediaInfo tree, tags, extra files, upload record, and which regression tests use them - plus per-platform status of the most recent run for that sample.

The upload side covers uploading a new sample, the queue of uploads awaiting processing, linking a queued upload to a sample or deleting it, and FTP credentials for large uploads.

Review notes
Media info is best-effort - a missing or unparseable XML shows as absent rather than failing the page, matching what the API does.

Uploads go to /samples/upload as plain multipart. Worth knowing that the nginx body limit in PR 9 is what makes this work at all for real files; today nginx would reject anything over 1 MB.

Deleting a sample warns that it takes its regression tests with it.

[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