I'm a big fan of looking at usual problems through unusual lenses - while something normally easy is contrived, the different perspective might make a hard prob

I'm a big fan of looking at usual problems through unusual lenses - while something normally easy is contrived, the different perspective might make a hard problem much more easily grokked. I wish OP included a working project that lets one ingest a ledger, producing a graph. Perhaps this graph view might be used for "forensic" purposes, where a one-line entry buried deep would stand out as an odd node? Still a hard sell with only one very basic example provided -- especially in a domain that's been around forever and where any advantage is critical. The DE ledger seems like a basic, simple tool, iterated into perfection over millennia. You'd think you could improve it, but good luck if you try.