fix: fallback for empty file paths in Source construction

[kyteinsky]

No description provided.

[Copilot]

Pull Request Overview

This PR adds fallback handling for empty file paths when constructing Source objects. The change ensures that if getInternalPath() returns empty or null, the code will fall back to getPath() and then to getName() as alternatives.

• Updates Source construction to use a fallback chain for file paths
• Applies the same pattern consistently across ScanService and IndexerJob

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
lib/Service/ScanService.php	Added fallback chain for file path in Source construction
lib/BackgroundJobs/IndexerJob.php	Added fallback chain for file path in Source construction

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