// CheckMasterReady checks if the master is ready.
// This function verifies if the GooseFS master StatefulSet has the expected number of ready replicas
// and updates the runtime status accordingly when the master is determined to be ready.
//
// Parameters:
//   - None explicit, uses the GooseFSEngine receiver
//
// Returns:
//   - ready (bool): True if the master has the expected number of ready replicas, otherwise false.
//   - err (error): Returns an error if any operation fails, otherwise returns nil.