CVE-2026-62681: Orval: RCE via OpenAPI path -> unescaped request-URL template literal (backtick breakout)

Orval emits the OpenAPI path into the generated request URL as a TEMPLATE LITERAL (`/users/...`) without escaping the backtick character. A path containing a backtick closes the template literal and injects a concatenation expression that is evaluated when the generated URL/request/key function is called, executing attacker-controlled code. Affects the axios, fetch, react-query, and swr clients. Verified on Orval 8.19.0; survives Orval’s default OpenAPI validation.