Function rememberTouch

packages/core/sdk/src/subject-registry.ts:82–91

(key: string, at: number)

const touchCacheKey = (tenant: string, externalId: string) => `${tenant}${externalId}`;

const rememberTouch = (key: string, at: number): void => {
  // Re-insert so the key moves to the end of the Map's insertion order, making
  // the oldest-touched entry the natural eviction target.
  lastTouchedAt.delete(key);
  lastTouchedAt.set(key, at);
  if (lastTouchedAt.size > MAX_TRACKED_SUBJECTS) {
    const oldest = lastTouchedAt.keys().next();
    if (!oldest.done) lastTouchedAt.delete(oldest.value);
  }
};

/** Test seam: drop the process-local sighting memory. */
export const resetSubjectTouchCache = (): void => {