Weekly PDF split: track ranges and page numbering

For a recurring PDF split, record the source version, total page count, requested ranges, and output filenames. Recheck ranges every week rather than reusing last week's page numbers blindly; inserted cover pages can shift all later content. Open each output and confirm first and last pages, text, and any links that must remain functional. If the source is confidential, confirm each recipient receives only the pages they are authorized to see.