Google Contacts, the address book built into Gmail, lets you keep track of all your contacts, see when you last interacted with them, and more.
Put checked PDF links beside their source files in the request sheet.
Your team gets checked PDF links in the spreadsheet, with clear issues on rows that need a fix.
Open one review per manual revision with changes and prior sign-off.
Your document review and approval process has a clear next step: a linked task with the changes and prior decision for the revised manual.
File converted documents in mapped folders and report any altered structure.
Your Markdown files become editable documents in the right shared folders, with links and formatting issues collected in a daily report.