resolve comments: remove hardcoded metric count, simplify tests

- Remove "16 metrics" from javadoc (implementation detail)
- Simplify TeamUsageStatsTest for non-multi-tenant app
- Restore original client after TeamUsageStatsIntegrationTest

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Daksh

src/main/java/io/getstream/chat/java/models/TeamUsageStats.java

@@ -212,7 +212,7 @@ public static class QueryTeamUsageStatsResponse extends StreamResponseObject {
   /**
    * Queries team-level usage statistics from the warehouse database.
    *
-   * <p>Returns all 16 metrics grouped by team with cursor-based pagination.
+   * <p>Returns usage metrics grouped by team with cursor-based pagination.
    *
    * <p>Date Range Options (mutually exclusive):
    *

src/test/java/io/getstream/chat/java/TeamUsageStatsTest.java

@@ -1,17 +1,17 @@
 package io.getstream.chat.java;
 
-import io.getstream.chat.java.models.TeamUsageStats.QueryTeamUsageStatsResponse;
 import io.getstream.chat.java.models.TeamUsageStats;
+import io.getstream.chat.java.models.TeamUsageStats.QueryTeamUsageStatsResponse;
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
 /**
- * Basic tests for Team Usage Stats API using regular (non-multi-tenant) app credentials.
- * Since the regular app doesn't have multi-tenant enabled, teams will always be empty.
- * Full data verification is done in TeamUsageStatsIntegrationTest with multi-tenant credentials.
+ * Basic tests for Team Usage Stats API using regular (non-multi-tenant) app credentials. Since the
+ * regular app doesn't have multi-tenant enabled, teams will always be empty. Full data verification
+ * is done in TeamUsageStatsIntegrationTest with multi-tenant credentials.
  */
 public class TeamUsageStatsTest {