Add commit approval date to "GET an individual commit" API (BB-12017)

The "GET an individual commit" API currently provides a list of participants who approved the commit. However it doesn't include the date that each participant approved the commit.

Could this be added please?

This data seems to be stored by Bitbucket since hovering over a participant's icon on a commit page shows a tooltip such as "James Bursa approved this changeset 4 hours ago".

I would like to use this to collect statistics on how long it takes to approve commits for our team.

Perhaps it might look like this in the API response:

#!javascript
    participants: [{
        role: "PARTICIPANT",
        user: {
            ...
        },
        approved: true,
        approved_date: "2015-01-21T07:21:51+00:00",   /* new field */
    }],