Merge pull request #2302 from mslipper/bugfix/proxyd-zero-oos-interval

proxyd: Don't hit Redis when the out of service interval is zero

.changeset/perfect-ties-decide.md

+---
+'@eth-optimism/proxyd': patch
+---
+
+Don't hit Redis when the out of service interval is zero

go/proxyd/rate_limiter.go

@@ -85,6 +85,9 @@ func (r *RedisRateLimiter) IsBackendOnline(name string) (bool, error) {
 }
 
 func (r *RedisRateLimiter) SetBackendOffline(name string, duration time.Duration) error {
+	if duration == 0 {
+		return nil
+	}
 	err := r.rdb.SetEX(
 		context.Background(),
 		fmt.Sprintf("backend:%s:offline", name),