Function createObservedFetch

createObservedFetch(options: ObservedFetchOptions): ObservedFetch
Wraps a fetch so its attempts are counted for the local diagnostics connector (M98n).

Calling this IS the opt-in: build the helper only when a devtool composition is present, and register plugin in that application. The wrapper records that an attempt started, whether it resolved or failed, the response's status class and its time to headers — nothing else. It never reads the URL, headers, body, signal or error.

Deliberate departure: a wrapped fetch that throws SYNCHRONOUSLY is rethrown synchronously, although the return type is a promise — the wrapper must not change the behavior of the application code it wraps.
Parameters
- options: ObservedFetchOptions
  The alias, and optionally the fetch and clock
Returns ObservedFetch
The observed fetch and its registration plugin
Throws
For malformed options, a failing clock probe, or no crypto.getRandomValues — each with a fixed message naming no value

Throws
For an alias outside 1–64 UTF-8 bytes or carrying a control character
Example
```
const observed = createObservedFetch({ alias: 'payments-api' });
const client = createClient({ baseUrl: 'https://payments.example', fetch: observed.fetch });
```
Since
0.8.0
- Defined in packages/sdk/src/http/observed-fetch.ts:171