Detect Events that have no corresponding root record

[skliche]

As a user
I want to be able to analyze events that do not have a corresponding root event.

Missing root events happen when metrics are turned on or when there are some issues in the request metrics subsystem.

• The events have to be detected and a dummy root record should be created and added to the dataset.
• The user should be informed how many records have missing root records.

[skliche]

We could utilize the observer framework of the RmProcessor to throw an event once an rm record without a root record has been detected.

[skliche]

Rewrote the main data structure and added a list of dirty events with commit 17ccfaf