Stores fetch state for GET /accounts/{parcelNumber}.
Parameters
state: FetchState<TaxAccount> = defaultFetchState
action: ReducerAction
Returns {loading:boolean}
Remarks
State is { loading: boolean, data?: TaxAccount, error?: string }.
The request action sets loading; success stores the account; failure stores
the error; and sessionReset restores { loading: false }.
Stores fetch state for GET /accounts/{parcelNumber}.