[opentelemetry-auto-laravel] fix: serialization error when calls internal Redis::Pipeline command (#331)

* fix: add ability to escape error, when serialized parameter is closure or callable function
* tests: add pipeline serialization test case

Author: 090809

src/Watchers/RedisCommand/Serializer.php

@@ -70,7 +70,17 @@ public static function serializeCommand(string $command, array $params): string
         }
 
         // In some cases (for example when using LUA scripts) arrays are valid parameters
-        $paramsToSerialize = array_map(function ($param) { return is_array($param) ? json_encode($param) : $param; }, $paramsToSerialize);
+        // In additional cases, Closure are also valid parameters (Pipeline command)
+        $paramsToSerialize = array_map(
+            static function ($param) {
+                return match (true) {
+                    is_array($param) => json_encode($param),
+                    is_callable($param) => 'Callable',
+                    default => $param,
+                };
+            },
+            $paramsToSerialize
+        );
 
         return $command . ' ' . implode(' ', $paramsToSerialize);
     }

tests/Unit/Watches/RedisCommand/SerializerTest.php

@@ -34,5 +34,7 @@ public function serializeCases(): iterable
 
         // Parameters of array type
         yield ['EVAL', ['param1', 'param2', ['arg1', 'arg2']], 'EVAL param1 param2 ["arg1","arg2"]'];
+
+        yield ['pipeline', [function () {}], 'pipeline Callable'];
     }
 }