Returns the latest Espo indexed height. Use this as the health and freshness check for clients.
Clients commonly call this before pagination or historical reads so they can tell whether the explorer is caught up to the chain tip they expect.
{ "jsonrpc": "2.0", "id": 1, "method": "get_espo_height", "params": {} }
{ "jsonrpc": "2.0", "result": { "height": 946000 }, "id": 1 }