/**
 * Tests for the on-box realtime publisher (mission-control US-009):
 *   - defaultRealtimeCredentialsFetcher POSTs the box's JWT to
 *     /v1/realtime/credentials and parses the response
 *   - createIotPublishPort vends scoped creds, builds an IoT client, publishes
 *     to the caller's topic, caches the client until near-expiry, and re-guards
 *     the no-secrets contract at the transport boundary
 */
export {};
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