OpenLand 1.0.4

Bug Fixes

• fixed global variable binding issue: resolved CRAN NOTE "no visible binding for global variable 'changes'" by properly declaring changes as a global variable used in dplyr operations. This ensures compatibility with current dplyr releases where the deprecated dplyr::changes() function is completely removed (@DavisVaughan, #13)

New Features

• implemented .openland_try_download_and_load_rda() function for graceful dataset loading with informative error messages
• enhanced dataset availability checks in vignette and examples with automatic error recovery