Function createTimingHook

createTimingHook(): {
beforeRequest: BeforeRequestHook;
afterResponse: AfterResponseHook;
}
Hook: measure request timing and attach to response meta.

Returns { beforeRequest: BeforeRequestHook; afterResponse: AfterResponseHook }
An object containing:
- beforeRequest: Records the start timestamp in the context metadata.
- afterResponse: Computes elapsed time and sets durationMs in context metadata.
- beforeRequest: BeforeRequestHook
  Records the start timestamp in the context metadata.
- afterResponse: AfterResponseHook
  Computes elapsed time and sets durationMs in context metadata.
- Defined in src/lifecycle.ts:1131