Let rules be created that have an action to "Add suffix to notes" or "Add prefix to notes", which would update existing notes with a prefix or suffix.

for example, I have a purchase that's imported with: payee: "<Company> <Branch#>" and notes: "note123". I'd like to set a rule so that the payees can be aggregated to "Company" and have the notes be set to "<BranchName> note123"