Main wrapper function for Phase D standardization pipeline. Loads combined data, applies consolidations, assigns ISO codes, and saves standardized output.
Arguments
- input_file
Path to combined RDS file. Required (no default) so the function never reads from a package or home directory implicitly.
- output_file
Path to write standardized RDS file. Required (no default) so the function never writes to a package or home directory implicitly.
- mapping_file
Path to consolidation mapping CSV
