Fix InvocationTargetException

✅ Solution

InvocationTargetException often wraps an exception thrown by a constructor or method invoked via reflection; in the problematic EsqlNodeSubclassTests, likely a constructor for classes like UnresolvedPromqlFunction or VectorBinaryComparison is failing. Examine the wrapped exception's stack trace to identify the root cause (e.g., missing dependencies, incorrect argument types, or unhandled exceptions within the constructor). Address the root cause by providing correct constructor arguments, resolving missing dependencies, or handling exceptions within the constructor's logic.