Repair checker expects to have information about CreatedAt and RepairedAt fields to calculate segment age metric.
Change-Id: I6b41df880d77133be541e14d10d91cc75759b339
we want to know a lot more about what's going on during
the operation of the metainfo loop. this patchset adds
more instrumentation to previously unmonitored but
interesting functions, and adds metrics that keep track
of how far through a specific loop we are. it also
adds mon:lock annotations, especially to the metainfo
loop run task, which recently changed, silently broke
some queries, and thus failed to alert us to spiking
run time issues.
Change-Id: I4358e2f2293d8ebe30eef497ba4e423ece929041
