Reprocessing Accounting Detail Files Without Affecting FreeRADIUS

Dear FreeRADIUS Community, I am writing to seek advice on the best approach to reprocess accounting detail files without affecting the live operation of FreeRADIUS. Currently, I write accounting records into detail files in 15-minute intervals. However, sometimes I occasionally need to reprocess these files at a later time. Would radrelay be the right tool for this, or is there a better approach? I am considering a solution where I can trigger the reprocessing via a single command or have a listener that can be activated with restarting FreeRADIUS. I would appreciate any recommendations on the best way to achieve this. Best regards,