ParkedResolution
data class ParkedResolution(val service: String, val context: String, val subscription: String, val aggregate: EntryAggregate, val failedAt: Long? = null, val outcome: String, val resolvedAt: Long)
subscription of service no longer parks aggregate, as of resolvedAt: the parking that failed at failedAt came to outcome (RETRIED, SKIPPED, RESOLVED or NOT_PARKED).