Function backend

backend(
    site: SitePhpDurableObject,
    request: Request,
    url: URL,
): Promise<Response>
probes the Hyperdrive backend with SELECT 1, whether or not DB_BACKEND selected it
Parameters
- site: SitePhpDurableObject
- request: Request
- url: URL
Returns Promise<Response>
- Defined in src/do/routes/diagnostics.ts:22