An in-memory implementation of UCClient for testing purposes. This implementation simulates Unity Catalog operations without actually connecting to a remote service. It maintains all state in memory in InMemoryUCCommitCoordinator

This class provides a lightweight way to test Delta table operations that would normally require interaction with the Unity Catalog.

Example usage:

val metastoreId = "test-metastore"
val ucCommitCoordinator = new InMemoryUCCommitCoordinator()
val client = new InMemoryUCClient(metastoreId, ucCommitCoordinator)

// Use the client for testing
val getCommitsResponse = client.getCommits(
    "tableId",
    new URI("tableUri"),
    Optional.empty(),
    Optional.empty())