Preview a candidate status-change email decision

Required scopes: applications:read, communications:read

Secret keys only. Previews the dashboard-visible candidate email decision states for a status transition without mutating the Application or drafts. Returns decision vocabulary, sender override validation, personalization tier, safety state, and side-effect preview.

Example (curl):

curl -X POST https://api.yardstick.team/v1/applications/app_abc123/email-decision/preview \
  -H 'Authorization: Bearer ys_sk_live_…' \
  -H 'Content-Type: application/json' \
  -d '{"status":"Interviewing"}'

Example (TypeScript):

await fetch("https://api.yardstick.team/v1/applications/app_abc123/email-decision/preview", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.YS_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({ status: "Interviewing" }),
}).then((r) => r.json());