Reference example verification

Every sample on this reference is executed against the production API on a schedule and after each deploy. The block runs exactly as this site prints it, each tab in its own runtime (the cURL by curl, the TypeScript tab by node, the Python tab by a virtualenv), with only the key filled in. This is the result of the last run, in full.

Only reads run. A command that would write creates a real support ticket, webhook endpoint or seller listing on every pass, and the outbound click tracker would count a visit on somebody's listing, so those are listed as not run with the reason rather than left out. The counts above describe exactly what was executed.