Add endpoint to retrieve cache content for individual task

Modify existing endpoint to remove spark dependency while retrieving Ignite cache

The issue names an existing endpoint that retrieves Ignite cache content for an individual task, but it does not identify the file, controller, entry point, or tests. Start by locating that endpoint and tracing its cache retrieval path. Done means the endpoint retrieves the task's Ignite cache content without the Spark dependency; add or update coverage if the repository has tests for this endpoint.

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