fix(redis): use spread operator for variadic Redis set operations

Fixed critical bug in RedisMetricsStore where arrays were being passed
directly to PhpRedis sadd() and srem() methods instead of using the
spread operator to unpack them as variadic arguments.

This caused Redis to store the literal string "Array" instead of actual
job identifiers in discovery sets, which resulted in:
- listJobs() returning empty arrays
- throughput_per_minute showing 0
- avg_duration_ms showing 0
- All aggregated metrics failing to calculate

Changes:
- addToSet(): Changed sadd($key, $members) to sadd($key, ...$members)
- removeFromSet(): Changed srem($key, $members) to srem($key, ...$members)

Test Results:
- 124 out of 125 tests passing
- Metrics now calculate correctly with actual job data
- Discovery sets properly storing job identifiers

Author: sylvesterdamgaard

src/Support/RedisMetricsStore.php

@@ -172,7 +172,7 @@ public function removeFromSortedSet(string $key, string $member): void
     public function addToSet(string $key, array $members): void
     {
         if (! empty($members)) {
-            $this->getRedis()->sadd($key, $members);
+            $this->getRedis()->sadd($key, ...$members);
         }
     }
 
@@ -190,7 +190,7 @@ public function getSetMembers(string $key): array
     public function removeFromSet(string $key, array $members): void
     {
         if (! empty($members)) {
-            $this->getRedis()->srem($key, $members);
+            $this->getRedis()->srem($key, ...$members);
         }
     }