[Bug] Activity metric details are not correct

[frank-zsy]

Current Behavior

Some duplicate items shows in the activity details if groupTimeRange is not month. Like https://oss.open-digger.cn/github/X-lab2017/open-digger/activity_details.json

Expected Behavior

The activity details should be correct for any time range option.

Any Additional Comments?

The reason is that the detail is basic queried based on monthly data which is how activity calculated, and for other group option, we just collect all the details from each month but not aggregate them based on actor level, should fix this.