FetchCreatedTime returns the earliest known creation time for a given repository based on the commit history, before or equal to earliestSoFar.

FetchIssueCommentCount returns the total number of comments for a given repo across all issues and pull requests, for the past lookback duration.

FetchIssueCount returns the total number of issues for a given repo in a given state, across the past lookback duration.

FetchOrgCount returns the number of unique orgs/companies for the top MaxTopContributors of a given repository.

FetchTotalContributors returns the total number of contributors for the given repository.

Round will return v approximately rounded to a precision of p decimal places.

TODO: these limits should ultimately be imposed by the score generation, not here.