Fix: Sanitize cache keys to avoid reserved characters validation error

[camilleislasse]

Problem

When uploading files to subfolders (e.g., user-uploads/2024/image.jpg), cache keys generated by MediaPropertyAccessor and MediaVariationPropertyAccessor contain forward slashes (/), which are reserved characters in PSR-6 cache implementations.

This causes errors like:

This causes validation errors with real cache adapters:
Cache key "joli_media_property_default_subfolder/file.jpg_lastModified" contains reserved characters "{}()/:"

Solution

• Created CacheKeySanitizer helper class to sanitize cache keys by replacing PSR-6 reserved characters ({}()/\@:) with underscores
• Applied sanitization to libraryName, path, and variation->getName() in cache key generation
• The sanitization only affects cache keys, not the actual file paths used to access files

Testing

To test with a real cache adapter, replace the mock in tests/src/BaseTestCase.php with:

$cache = new ArrayAdapter();

This will show the cache key validation errors before the fix, and confirm they're resolved after.

[xavierlacot]

Thanks @camilleislasse for the contribution 💛