Add integration tests verifying the workaround for checking if a tag has any
value in smart playlists. The tests confirm that using 'contains' with an empty
string generates SQL that matches any non-empty tag value (value LIKE '%%'),
which is the recommended workaround for issue #4728.
Tests added:
- Verify contains with empty string matches tracks with tag values
- Verify notContains with empty string excludes tracks with tag values
Also updated test context to use GinkgoT().Context() instead of context.TODO().
Deluan
228211f925