chore: regenerate serviceusage client (googleapis#32423)

Generated in GitHub action: https://togithub.com/googleapis/googleapis/google-api-java-client-services/actions/workflows/codegen.yaml

Author: yoshi-code-bot

clients/google-api-services-serviceusage/v1beta1/2.0.0/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-serviceusage</artifactId>
-      <version>v1beta1-rev20260721-2.0.0</version>
+      <version>v1beta1-rev20260731-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-serviceusage:v1beta1-rev20260721-2.0.0'
+  implementation 'com.google.apis:google-api-services-serviceusage:v1beta1-rev20260731-2.0.0'
 }
 ```
 

clients/google-api-services-serviceusage/v1beta1/2.0.0/com/google/api/services/serviceusage/v1beta1/model/ConsumerQuotaLimit.java

@@ -78,6 +78,14 @@ public final class ConsumerQuotaLimit extends com.google.api.client.json.Generic
   @com.google.api.client.util.Key
   private java.util.List<java.lang.String> supportedLocations;
 
+  /**
+   * Indicates the traffic type attribution for this quota limit (e.g. agentic). This is an
+   * informational field used to categorize and filter the quota limits.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.String trafficSource;
+
   /**
    * The limit unit. An example unit would be `1/{project}/{region}` Note that `{project}` and
    * `{region}` are not placeholders in this example; the literal characters `{` and `}` occur in
@@ -203,6 +211,25 @@ public ConsumerQuotaLimit setSupportedLocations(java.util.List<java.lang.String>
     return this;
   }
 
+  /**
+   * Indicates the traffic type attribution for this quota limit (e.g. agentic). This is an
+   * informational field used to categorize and filter the quota limits.
+   * @return value or {@code null} for none
+   */
+  public java.lang.String getTrafficSource() {
+    return trafficSource;
+  }
+
+  /**
+   * Indicates the traffic type attribution for this quota limit (e.g. agentic). This is an
+   * informational field used to categorize and filter the quota limits.
+   * @param trafficSource trafficSource or {@code null} for none
+   */
+  public ConsumerQuotaLimit setTrafficSource(java.lang.String trafficSource) {
+    this.trafficSource = trafficSource;
+    return this;
+  }
+
   /**
    * The limit unit. An example unit would be `1/{project}/{region}` Note that `{project}` and
    * `{region}` are not placeholders in this example; the literal characters `{` and `}` occur in

clients/google-api-services-serviceusage/v1beta1/2.0.0/pom.xml

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-serviceusage</artifactId>
-  <version>v1beta1-rev20260721-2.0.0</version>
-  <name>Service Usage API v1beta1-rev20260721-2.0.0</name>
+  <version>v1beta1-rev20260731-2.0.0</version>
+  <name>Service Usage API v1beta1-rev20260731-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>

clients/google-api-services-serviceusage/v1beta1/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-serviceusage</artifactId>
-      <version>v1beta1-rev20260721-2.0.0</version>
+      <version>v1beta1-rev20260731-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-serviceusage:v1beta1-rev20260721-2.0.0'
+  implementation 'com.google.apis:google-api-services-serviceusage:v1beta1-rev20260731-2.0.0'
 }
 ```