RuleEngine pipeline states
A RuleEngine pipeline can have the following states:
| NotInitalized: The started RuleEngine pipeline was received by the Storage Provider but not processed. |
| Initalizing: The RuleEngine pipeline is initialized. The corresponding rules are created. |
| IsStarting: The RuleEngine pipeline is starting. Included rules are started. |
| Running: The RuleEngine pipeline is running. All rules are at least in the Pending state and there is no error. |
| IsStopping: The RuleEngine pipeline is stopping, all rules are stopping. |
| Stopped: The RuleEngine pipeline is stopped, all rules are stopped. |
| Error: There is an error in at least one rule. |



