docs: improve enterprise code documentation, formatting, and 10-agent Copilot architecture details

fix: graph node laundering annotation, alert queue crash, and popover width shift

fix: prevent call stack overflow in graph investigation

feat: laundering-aware subgraph expansion and copilot updates

Fix investigation view rendering, fix STR PDF generation (unicode/limit), and add graph checkpoint for fast server restart

changed

Initial commit: Fund Flow Tracker AML Dashboard