# Functions
InitBaseMetrics will initialize base, default metrics to 0 values.
InitConfigMetrics will init the "enable epochs" configuration metrics from epoch config.
InitMetrics will init metrics for status handler.
InitRatingsMetrics will init the ratings configuration metrics.
SaveStringMetric will save a string metric in status handler.
SaveUint64Metric will save an uint64 metric in status handler.
# Variables
ErrNilAppStatusHandler signals that a nil app status handler instance has been provided.