[RAP] Multiple Comments per Financial Document (BKPF/BSEG) - Need Guidance

I’m working on a RAP application where users need to add multiple comments to financial documents. The data model involves standard SAP tables (BKPF/BSEG) with a custom Z table for comment storage. Business Requirements: Header level: Up to 4 comments per financial document header Position level: Up to 2 comments per line item (BSEG position) Users should be able to browse and select documents via a List Report and add comments through a Fiori app