[clsi] minor fixes for clsi-cache (#30551)

* [clsi] fix circuit breaker for clsi-cache

* [clsi] enable ts-check for CLSICacheHandler

* [clsi] limit the number of .blg files in clsi-cache to 50

* [clsi-cache] limit the number of files per job to 100

* [clsi-cache] explain early registration of buildId

* [clsi-cache] lock down downloads via nginx to project folder

GitOrigin-RevId: 081d0c40b08db3a384c4d765b71a50b973f42151

libraries/metrics/index.js

@@ -97,6 +97,12 @@ function histogram(key, value, buckets, labels = {}) {
 }
 
 class Timer {
+  /**
+   * @param {string} key
+   * @param {number} sampleRate
+   * @param {Record<string, any>} labels
+   * @param {Array<number>} buckets
+   */
   constructor(key, sampleRate = 1, labels = {}, buckets = undefined) {
     if (typeof sampleRate === 'object') {
       // called with (key, labels, buckets)