Function useFetch

useFetch<T>(
    key: readonly unknown[],
    fetcher: Fetcher<T>,
    options?: UseFetchOptions,
): UseFetchResult<T>
Core fetch-on-mount hook with cancellation, polling, and retry.

Every domain hook in @playlive/react-data is a thin shell around this primitive. Surface lifted directly out of TanStack Query's useQuery for API-compatibility.

behavior:
- key changes ⇒ abort in-flight + refetch.
- enabled = false ⇒ never fetch + reset isLoading to false.
- refetchInterval > 0 ⇒ poll on a timer; the timer is reset after each successful resolve (no overlapping fetches).
- Errors trigger up to retry retries with exponential backoff.
- Unmount aborts any in-flight request and cancels pending timers.
Type Parameters
- T
  Resolved payload type.
Parameters
- key: readonly unknown[]
  Stable identity for the request. Any change (deep equality on the serialized form) triggers a refetch.
- fetcher: Fetcher<T>
  Async function receiving { signal }.
- options: UseFetchOptions = {}
  Standard UseFetchOptions.
Returns UseFetchResult<T>
Example
```
const { data, error, isLoading, refetch } = useFetch(
  ["campaign", id],
  ({ signal }) => fetchCampaign({ id }, { signal }),
  { enabled: !!id, refetchInterval: 5_000 }
);
```
- Defined in core/useFetch.ts:59