fix: bring _prefix() back

Signed-off-by: Mateusz Cholewka <mateusz@cholewka.com.pl>

Author: mtk3d

src/Prometheus/Storage/AbstractRedis.php

@@ -292,7 +292,7 @@ protected function collectHistograms(): array
         sort($keys);
         $histograms = [];
         foreach ($keys as $key) {
-            $raw = $this->redis->hGetAll(ltrim($key, $this->redis->getOption(RedisClient::OPT_PREFIX)));
+            $raw = $this->redis->hGetAll(ltrim($key, $this->redis->prefix('')));
             if (! isset($raw['__meta'])) {
                 continue;
             }
@@ -373,7 +373,7 @@ protected function removePrefixFromKey(string $key): string
             return $key;
         }
 
-        return substr($key, strlen($this->redis->getOption(RedisClient::OPT_PREFIX)));
+        return substr($key, strlen($this->redis->prefix('')));
     }
 
     /**
@@ -483,7 +483,7 @@ protected function collectGauges(bool $sortMetrics = true): array
         sort($keys);
         $gauges = [];
         foreach ($keys as $key) {
-            $raw = $this->redis->hGetAll(ltrim($key, $this->redis->getOption(RedisClient::OPT_PREFIX)));
+            $raw = $this->redis->hGetAll(ltrim($key, $this->redis->prefix('')));
             if (! isset($raw['__meta'])) {
                 continue;
             }
@@ -525,7 +525,7 @@ protected function collectCounters(bool $sortMetrics = true): array
         sort($keys);
         $counters = [];
         foreach ($keys as $key) {
-            $raw = $this->redis->hGetAll(ltrim($key, $this->redis->getOption(RedisClient::OPT_PREFIX)));
+            $raw = $this->redis->hGetAll(ltrim($key, $this->redis->prefix('')));
             if (! isset($raw['__meta'])) {
                 continue;
             }

src/Prometheus/Storage/RedisClients/PHPRedis.php

@@ -96,6 +96,11 @@ public function del(array|string $key, string ...$other_keys): void
         }
     }
 
+    public function prefix(string $key): string
+    {
+        return $this->redis->_prefix($key);
+    }
+
     /**
      * @throws StorageException
      */

src/Prometheus/Storage/RedisClients/Predis.php

@@ -120,6 +120,11 @@ public function del(array|string $key, string ...$other_keys): void
         $this->client->del($key, ...$other_keys);
     }
 
+    public function prefix(string $key): string
+    {
+        return $this->getOption(RedisClient::OPT_PREFIX).$key;
+    }
+
     public function ensureOpenConnection(): void
     {
         // Predis doesn't require to trigger connection

src/Prometheus/Storage/RedisClients/RedisClient.php

@@ -45,5 +45,7 @@ public function get(string $key): mixed;
      */
     public function del(array|string $key, string ...$other_keys): void;
 
+    public function prefix(string $key): string;
+
     public function ensureOpenConnection(): void;
 }