Use explicit type switches and remove taskQueueBreakdown override

- Match StickyPartition explicitly instead of using default case
- Default to unknownValue for unrecognized partition types
- Remove taskQueueBreakdown=false override; BreakdownMetricsByTaskQueue
  already controls this

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: rkannan82

common/metrics/task_queues.go

@@ -63,11 +63,12 @@ func GetPerTaskQueuePartitionIDScope(
 		} else {
 			value = normal
 		}
+	case *tqid.StickyPartition:
+		value = sticky
 	case *tqid.WorkerCommandsPartition:
 		value = workerCommands
-		taskQueueBreakdown = false
 	default:
-		value = sticky
+		value = unknownValue
 	}
 
 	return GetPerTaskQueueScope(handler, namespaceName, partition.TaskQueue(), taskQueueBreakdown,
@@ -89,11 +90,12 @@ func GetPerTaskQueuePartitionTypeScope(
 		value = unknownValue
 	case *tqid.NormalPartition:
 		value = normal
+	case *tqid.StickyPartition:
+		value = sticky
 	case *tqid.WorkerCommandsPartition:
 		value = workerCommands
-		taskQueueBreakdown = false
 	default:
-		value = sticky
+		value = unknownValue
 	}
 
 	return GetPerTaskQueueScope(handler, namespaceName, partition.TaskQueue(), taskQueueBreakdown,

service/matching/matching_engine_test.go

@@ -5259,9 +5259,9 @@ func TestLoggerAndMetricsForPartition_BreakdownEnabled(t *testing.T) {
 			expectPartitionTag: "0",
 		},
 		{
-			name:               "worker-commands queue gets __worker_commands__ partition and __omitted__ taskqueue",
+			name:               "worker-commands queue gets __worker_commands__ partition tag",
 			partition:          newTestTaskQueue(ns.ID().String(), "my-task-queue", enumspb.TASK_QUEUE_TYPE_NEXUS).WorkerCommandsPartition("/temporal-sys/worker-commands/ns/key"),
-			expectTQValue:      "__omitted__",
+			expectTQValue:      "my-task-queue",
 			expectPartitionTag: "__worker_commands__",
 		},
 		{