- Add comprehensive ImageMosaic test coverage: direct directory, manual granules,
empty store workflows, and XML-based store creation
- Fix file path handling: use direct paths instead of file:// URLs for local files
- Update documentation to mention shared mount volume at /mnt/geoserver_data
- Add version testing examples (TAG=2.27.1.0, TAG=2.26.2.0) to README
Tests pass with datadir backend but show limitations with pgconfig backend.
Provides comprehensive test coverage for realistic ImageMosaic workflows.