fix(push): fix guard clauses to prevent error spam in logs (#17372)

pkg/loghttp/push/push.go

@@ -160,7 +160,7 @@ func ParseRequest(logger log.Logger, userID string, maxRecvMsgSize int, r *http.
 		for retentionPeriod, size := range retentionToSizeMapping {
 			retentionHours := RetentionPeriodToString(retentionPeriod)
 			// Add guard clause to prevent negative values from being passed to Prometheus counters
-			if size > 0 {
+			if size >= 0 {
 				bytesIngested.WithLabelValues(userID, retentionHours, isAggregatedMetric, policyName).Add(float64(size))
 				bytesReceivedStats.Inc(size)
 			} else {
@@ -181,7 +181,7 @@ func ParseRequest(logger log.Logger, userID string, maxRecvMsgSize int, r *http.
 			retentionHours := RetentionPeriodToString(retentionPeriod)
 
 			// Add guard clause to prevent negative values from being passed to Prometheus counters
-			if size > 0 {
+			if size >= 0 {
 				structuredMetadataBytesIngested.WithLabelValues(userID, retentionHours, isAggregatedMetric, policyName).Add(float64(size))
 				bytesIngested.WithLabelValues(userID, retentionHours, isAggregatedMetric, policyName).Add(float64(size))
 				bytesReceivedStats.Inc(size)