fix: initialize average cache state with cleared values

steamcache/avgcachestate/avgcachestate.go

@@ -14,11 +14,15 @@ type AvgCacheState struct {
 
 // New creates a new average cache state with the given size.
 func New(size int) *AvgCacheState {
-	return &AvgCacheState{
+	a := &AvgCacheState{
 		size: size,
 		avgs: make([]cachestate.CacheState, size),
 		mu:   sync.Mutex{},
 	}
+
+	a.Clear()
+
+	return a
 }
 
 // Clear resets the average cache state to zero.