Add logging during WAL replay
Add logging during WAL replay

Signed-off-by: Chris Marchbanks <0ad0b538c51a24737b83a297dff91636ee98d89e@gmail.com>

GoogleCloudPlatform/prometheus,prometheus/prometheus,alileza/prometheus,prometheus/tsdb,keegancsmith/prometheus,prometheus/prometheus,prometheus/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,kangwoo/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,kangwoo/prometheus,Gouthamve/prometheus,kangwoo/prometheus,alileza/prometheus,kangwoo/prometheus,alileza/prometheus,Gouthamve/prometheus,alileza/prometheus,keegancsmith/prometheus,keegancsmith/prometheus