[feature] metric related fixed. (3x)

- active streamer gauge connected the wrong variable.

common/src/main/kotlin/space/mori/chzzk_bot/common/metrics/Metrics.kt

@@ -14,7 +14,7 @@ object Metrics {
         .register(registry)
 
     var activeStreamer = 0.0
-    val activateGauge: Gauge = Gauge.builder("active_streamer_gauge", this) { streamer }
+    val activateGauge: Gauge = Gauge.builder("active_streamer_gauge", this) { activeStreamer }
         .description("Current Active Streamer Count")
         .register(registry)
 
@@ -24,8 +24,10 @@ object Metrics {
         .register(registry)
 
     fun refreshStreamerMetrics() {
-        streamer = UserService.getAllUsers().size.toDouble()
-        activeStreamer = UserService.getAllUsers().filter { !it.isDisabled }.size.toDouble()
+        val streamers = UserService.getAllUsers()
+
+        streamer = streamers.size.toDouble()
+        activeStreamer = streamers.filter { !it.isDisabled }.size.toDouble()
     }
 
     fun increaseStreaming(inc: Int = 1) {
@@ -34,4 +36,8 @@ object Metrics {
     fun decreaseStreaming(dec: Int = 1) {
         streaming -= dec
     }
+
+    init {
+        refreshStreamerMetrics()
+    }
 }