Short answer: give each browser fetch a request ID, carry it to the backend in a standard HTTP header, and emit that same ID in structured logs on both sides. Keep the pricing decision itself behind a flag with an explicit evaluation ID, so a rollback can be verified instead of guessed. The bro...
Source: [Dev.to](https://dev.to/trkfpn392751/frontend-backend-correlated-logging-browser-fetch-request-ids-and-server-logs-3gp3)