Include run details of jobs to fetch posts in profile setting

[hackerkid]

Currently we only include high level details of the last job diff.blog ran to fetch posts from RSS feed.

This should be extended to include the details of last N runs. The details can include

• The number of posts fetched in the run
• Details of error if any. This would be helpful for user to debug any issues of jobs not showing up in diff.blog.
• Datetime etc

This is the status quo

https://diff.blog/account/settings/blog/

The function which fetches the post lives at https://github.com/diffblog/diff.blog/blob/master/feed/lib.py#L227

[Amirthananth]

@hackerkid Is this issue still open to pick up ?