Function onboardState

onboardState(
    input: {
        destination: DestinationAddress | undefined;
        grants?: TokenGrants;
        hasToken?: boolean;
        plan: RecordAction[];
        subdomain: SendingSubdomain | null;
        zoneId: string | null;
    },
): OnboardState
Turns the four observables into one stage, so the surface reports which step it is waiting on.

DNS propagation runs to 24 hours, so a normal wait must not read as failure. settled means "re-running changes nothing", not "finished" (awaiting-verification is settled, not finished).
Parameters
- input: {
      destination: DestinationAddress | undefined;
      grants?: TokenGrants;
      hasToken?: boolean;
      plan: RecordAction[];
      subdomain: SendingSubdomain | null;
      zoneId: string | null;
  }
  - destination: DestinationAddress | undefined
  - Optionalgrants?: TokenGrants
    
    omitted by a caller that has not probed; then the grant branches cannot fire
  - OptionalhasToken?: boolean
    
    false when no Cloudflare account is connected at all
  - plan: RecordAction[]
  - subdomain: SendingSubdomain | null
  - zoneId: string | null
Returns OnboardState
- Defined in src/ops/mail-onboard.ts:384