Feature Request: Associate roles with each duration for better context of summary

[makkoncept]

For the --summary tag, we provide 3 options. The 3rd option is to provide custom durations for which the summary needs to be generated. We can compliment this feature by also taking the roles associated with each duration as input.

This would provide better context to the summary. For eg: it's expected that when you move to a leadership role in engineering, you tend to do more code reviews.