fix: NCS-84 More Verbose Logging (#51)

Reviewed-on: #51

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/AutoScaler.scala

@@ -167,7 +167,7 @@ class AutoScaler:
         catch
           case ex: Exception =>
             meterRegistry.counter("nowchess.coordinator.scale.failures", "direction", "up").increment()
-            log.warnf(ex, "Failed to scale up %s", config.k8sRolloutName)
+            log.errorf(ex, "Failed to scale up %s", config.k8sRolloutName)
 
   def scaleDown(): Unit =
     log.info("Scaling down Argo Rollout")
@@ -225,4 +225,4 @@ class AutoScaler:
         catch
           case ex: Exception =>
             meterRegistry.counter("nowchess.coordinator.scale.failures", "direction", "down").increment()
-            log.warnf(ex, "Failed to scale down %s", config.k8sRolloutName)
+            log.errorf(ex, "Failed to scale down %s", config.k8sRolloutName)

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/CacheEvictionManager.scala

@@ -80,14 +80,14 @@ class CacheEvictionManager:
                 count + 1
               catch
                 case ex: Exception =>
-                  log.warnf(ex, "Failed to evict game %s", gameId)
+                  log.errorf(ex, "Failed to evict game %s", gameId)
                   count
             }
           else count
         }
       catch
         case ex: Exception =>
-          log.warnf(ex, "Error processing game key %s", key)
+          log.errorf(ex, "Error processing game key %s", key)
           count
     }
 

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/FailoverService.scala

@@ -112,7 +112,7 @@ class FailoverService:
           else false
         catch
           case ex: Exception =>
-            log.warnf(ex, "Failed to migrate batch to %s, trying next", target.instanceId)
+            log.errorf(ex, "Failed to migrate batch to %s, trying next", target.instanceId)
             false
       if success then true else tryMigrateBatch(batch, batchIdx, instances, deadId, attempt + 1)
 

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/HealthMonitor.scala

@@ -192,7 +192,7 @@ class HealthMonitor:
               log.debugf("No pod found for instance %s, skipping deletion", instanceId)
         catch
           case ex: Exception =>
-            log.warnf(
+            log.errorf(
               ex,
               "Failed to delete pod for instance %s — removing from registry to prevent blocking scale-down",
               instanceId,

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/InstanceRegistry.scala

@@ -99,7 +99,7 @@ class InstanceRegistry:
           }
         catch
           case ex: Exception =>
-            log.warnf(ex, "Failed to parse instance metadata for %s — removing from registry", instanceId)
+            log.errorf(ex, "Failed to parse instance metadata for %s — removing from registry", instanceId)
             instances.remove(instanceId)
             meterRegistry.counter("nowchess.coordinator.instances.removed").increment()
             Uni.createFrom().item(())

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/LoadBalancer.scala

@@ -96,14 +96,14 @@ class LoadBalancer:
                 log.infof("Moved %d games from %s to %s", subscribed, over.instanceId, target.instanceId)
             catch
               case ex: Exception =>
-                log.warnf(ex, "Failed to move games from %s to %s", over.instanceId, target.instanceId)
+                log.errorf(ex, "Failed to move games from %s to %s", over.instanceId, target.instanceId)
           }
 
           val elapsed = System.currentTimeMillis() - startTime
           log.infof("Rebalance completed in %dms", elapsed)
     catch
       case ex: Exception =>
-        log.warnf(ex, "Rebalance failed")
+        log.errorf(ex, "Rebalance failed")
 
   private def getGamesToMove(instanceId: String, count: Int): List[String] =
     try
@@ -125,7 +125,7 @@ class LoadBalancer:
       }
     catch
       case ex: Exception =>
-        log.warnf(ex, "Failed to update Redis game sets")
+        log.errorf(ex, "Failed to update Redis game sets")
 
   @Scheduled(every = "30s")
   def periodicRebalanceCheck(): Unit =