Having metrics is one thing, but without them having visibility it's mostly pointless. We need to define an approach to making sure the metrics are visible/accessible to various users.
We'll need to capture some of the users/use cases. This will allow us to investigate different options.
For example, developers would benefit from metric information during their development activities at the change level. One approach would be to have the CI provide metrics/feedback upon commit.
Other users may be engineering managers who are perhaps more interested in overall trend of a repo.