Collect explore Search queries for a dashboard

[jaegeral]

Is your feature request related to a problem? Please describe.
More and more sources create Search queries, e.g. Sigma Rules, Intelligence, SearchTemplates... Those queries might be used in Analyzers, the UI or other places. For various reasons it might be really good to collect metadata on things like:

• Time to execute

• of executions (e.g. show me a popular query)

• Queries that caused errors

Describe the solution you'd like
One way to implement this would be to hook this method: https://github.com/google/timesketch/blob/master/timesketch/api/v1/resources/explore.py#L63 and collect the metrics

Describe alternatives you've considered
Alternative would be to store the metadata where the query was created, e.g. a Sigma Rule would store how often it was executed and needs to store the results.

Additional context

• Somehow the metrics collected need to be protected so one could only see own Queries.
• The data collected should not be tied to a sketch but independent.