FiskalPro — Lokálna REST API proxy

Locally running REST API proxy server (Node.js) for FiskalPro POS and fiscal devices. FiskalPro devices expose a TCP/IP interface for external control, which is not directly accessible from a web browser context. The proxy bridges the web application and the device — it accepts HTTP requests, translates them into FiskalPro's proprietary TCP protocol, and returns structured JSON responses. The API is documented via Swagger/OpenAPI and covers commands for receipt printing, sending device commands, and generating a UUID as a unique block identifier required by each FiskalPro receipt command. Runs as a local service on the same network as the device.