Prometheus & Thanos Infinite Metric Retention: Chaos Injection & Active-Active Resiliency: Cross-Region Replication & Split-Brain Guard

// Prometheus & Thanos Infinite Metric Retention Production Concurrency Control Pattern
// Topic: Chaos Injection & Active-Active Resiliency: Cross-Region Replication & Split-Brain Guard

async function processResourceWithLease(resourceId, leaseTimeoutMs = 5000) {
  const leaseToken = crypto.randomUUID();
  const acquired = await distributedCoordination.tryAcquire(resourceId, leaseToken, leaseTimeoutMs);
  if (!acquired) {
    throw new ConcurrencyLockError(`Resource ${resourceId} is leased by a competing worker.`);
  }
  try {
    return await executeAtomicMutation(resourceId);
  } finally {
    await distributedCoordination.release(resourceId, leaseToken);
  }
}