gargharsh3134

Adds latency metrics for ClusterState Appliers and Listeners

3

### Description Publish Otel Histogram type metrics to track latencies of ClusterState Appliers and Listeners. ### Related Issues Resolves #[[12332](https://github.com/opensearch-project/OpenSearch/issues/12332)] ### Check List - [ ] New functionality includes testing....

### Is your feature request related to a problem? Please describe Given the introduction of Request Tracing Framework (RTF) using OpenTelemetry (OTel), metrics (histogram/counter) can now be published and used...

[Paginating ClusterManager Read APIs] Paginate _cat/indices API.

27

### Is your feature request related to a problem? Please describe As the number of indices grow in an opensearch cluster, the response size and the latency of the default...

Implementing pagination for _cat/shards

5

### Description This change is targeted towards implementing pagination for ```_cat/shards``` API. A new parameter, ```nextToken```, has been introduced as both the query parameter as well as in the response...