[FEATURE] Support the ability to retrieve multiple details at once.

### Describe the feature

Currently, only retrieving the details of one entity at a time is supported. If you need to obtain multiple details at once, multiple calls are required, which leads to performance issues.

### Motivation

_No response_

### Describe the solution

_No response_

### Additional context

_No response_

The issue names no files, tests, or entry points. Start by locating the existing single-entity detail retrieval API and its callers, then determine the batch request and response contract. Done means multiple details can be retrieved in one call with coverage for the new behavior.

Written by the indexing model from the issue text.