chore: add changeset

Author: Julien-R44

.changeset/wicked-turkeys-shine.md

@@ -0,0 +1,21 @@
+---
+'bentocache': minor
+---
+
+Add experimental support for Node.js Diagnostic Channels (TracingChannel) for cache operations instrumentation.
+
+This enables APM tools and OpenTelemetry to trace cache operations with timing information:
+
+```ts
+import { tracingChannels } from 'bentocache'
+
+tracingChannels.cacheOperation.start.subscribe((message) => {
+  console.log(`Starting ${message.operation} on ${message.key}`)
+})
+
+tracingChannels.cacheOperation.asyncEnd.subscribe((message) => {
+  console.log(`Completed with hit=${message.hit}, tier=${message.tier}`)
+})
+```
+
+Traced operations: `get`, `set`, `delete`, `deleteMany`, `clear`, `expire`, and `getOrSet` (as get + set on miss).