feat: improve histogram buckets asserting error message (#5)

* chore: Improve asserting error message

* chore: Improve asserting error message

* chore: Typo

* fix: Change message labels serializing

---------

Co-authored-by: bakhtiyar.issakhmetov <[email protected]>

Author: infureal

src/Storage/RedisStorage/HistogramRedisStorage.php

@@ -111,7 +111,14 @@ public function fetchHistograms(): iterable
                 );
             }
 
-            Assert::notEmpty($bucketsWithValues);
+            Assert::notEmpty(
+                $bucketsWithValues,
+                sprintf(
+                    'Buckets with values are empty for [%s] metric with key [%s]',
+                    $keyWithLabels->metricName,
+                    $this->metricKeySerializer->serialize($keyWithLabels),
+                )
+            );
             $bucketsWithValues = array_map('floatval', $bucketsWithValues);
 
             yield new HistogramMetricValue(