feat(storagetransfer): update the API

#### storagetransfer:v1

The following keys were added:
- schemas.ErrorLogEntry.properties.url.readOnly

The following keys were changed:
- schemas.ErrorLogEntry.properties.errorDetails.description
- schemas.ErrorLogEntry.properties.url.description
- schemas.TransferSpec.properties.awsS3CompatibleDataSource.description
- schemas.TransferSpec.properties.awsS3DataSource.description
- schemas.TransferSpec.properties.azureBlobStorageDataSource.description
- schemas.TransferSpec.properties.gcsDataSink.description
- schemas.TransferSpec.properties.gcsDataSource.description
- schemas.TransferSpec.properties.hdfsDataSource.description
- schemas.TransferSpec.properties.httpDataSource.description
- schemas.TransferSpec.properties.posixDataSink.description
- schemas.TransferSpec.properties.posixDataSource.description

Author: yoshi-automation

discovery/storagetransfer-v1.json

@@ -632,7 +632,7 @@
       }
     }
   },
-  "revision": "20250523",
+  "revision": "20250801",
   "rootUrl": "https://storagetransfer.googleapis.com/",
   "schemas": {
     "AgentPool": {
@@ -841,14 +841,15 @@
       "id": "ErrorLogEntry",
       "properties": {
         "errorDetails": {
-          "description": "A list of messages that carry the error details.",
+          "description": "Optional. A list of messages that carry the error details.",
           "items": {
             "type": "string"
           },
           "type": "array"
         },
         "url": {
-          "description": "Required. A URL that refers to the target (a data source, a data sink, or an object) with which the error is associated.",
+          "description": "Output only. A URL that refers to the target (a data source, a data sink, or an object) with which the error is associated.",
+          "readOnly": true,
           "type": "string"
         }
       },
@@ -1902,47 +1903,47 @@
       "properties": {
         "awsS3CompatibleDataSource": {
           "$ref": "AwsS3CompatibleData",
-          "description": "An AWS S3 compatible data source."
+          "description": "Optional. An AWS S3 compatible data source."
         },
         "awsS3DataSource": {
           "$ref": "AwsS3Data",
-          "description": "An AWS S3 data source."
+          "description": "Optional. An AWS S3 data source."
         },
         "azureBlobStorageDataSource": {
           "$ref": "AzureBlobStorageData",
-          "description": "An Azure Blob Storage data source."
+          "description": "Optional. An Azure Blob Storage data source."
         },
         "gcsDataSink": {
           "$ref": "GcsData",
-          "description": "A Cloud Storage data sink."
+          "description": "Optional. A Cloud Storage data sink."
         },
         "gcsDataSource": {
           "$ref": "GcsData",
-          "description": "A Cloud Storage data source."
+          "description": "Optional. A Cloud Storage data source."
         },
         "gcsIntermediateDataLocation": {
           "$ref": "GcsData",
           "description": "For transfers between file systems, specifies a Cloud Storage bucket to be used as an intermediate location through which to transfer data. See [Transfer data between file systems](https://cloud.google.com/storage-transfer/docs/file-to-file) for more information."
         },
         "hdfsDataSource": {
           "$ref": "HdfsData",
-          "description": "An HDFS cluster data source."
+          "description": "Optional. An HDFS cluster data source."
         },
         "httpDataSource": {
           "$ref": "HttpData",
-          "description": "An HTTP URL data source."
+          "description": "Optional. An HTTP URL data source."
         },
         "objectConditions": {
           "$ref": "ObjectConditions",
           "description": "Only objects that satisfy these object conditions are included in the set of data source and data sink objects. Object conditions based on objects' \"last modification time\" do not exclude objects in a data sink."
         },
         "posixDataSink": {
           "$ref": "PosixFilesystem",
-          "description": "A POSIX Filesystem data sink."
+          "description": "Optional. A POSIX Filesystem data sink."
         },
         "posixDataSource": {
           "$ref": "PosixFilesystem",
-          "description": "A POSIX Filesystem data source."
+          "description": "Optional. A POSIX Filesystem data source."
         },
         "sinkAgentPoolName": {
           "description": "Specifies the agent pool name associated with the posix data sink. When unspecified, the default name is used.",

src/apis/storagetransfer/v1.ts

@@ -301,11 +301,11 @@ export namespace storagetransfer_v1 {
    */
   export interface Schema$ErrorLogEntry {
     /**
-     * A list of messages that carry the error details.
+     * Optional. A list of messages that carry the error details.
      */
     errorDetails?: string[] | null;
     /**
-     * Required. A URL that refers to the target (a data source, a data sink, or an object) with which the error is associated.
+     * Output only. A URL that refers to the target (a data source, a data sink, or an object) with which the error is associated.
      */
     url?: string | null;
   }
@@ -945,47 +945,47 @@ export namespace storagetransfer_v1 {
    */
   export interface Schema$TransferSpec {
     /**
-     * An AWS S3 compatible data source.
+     * Optional. An AWS S3 compatible data source.
      */
     awsS3CompatibleDataSource?: Schema$AwsS3CompatibleData;
     /**
-     * An AWS S3 data source.
+     * Optional. An AWS S3 data source.
      */
     awsS3DataSource?: Schema$AwsS3Data;
     /**
-     * An Azure Blob Storage data source.
+     * Optional. An Azure Blob Storage data source.
      */
     azureBlobStorageDataSource?: Schema$AzureBlobStorageData;
     /**
-     * A Cloud Storage data sink.
+     * Optional. A Cloud Storage data sink.
      */
     gcsDataSink?: Schema$GcsData;
     /**
-     * A Cloud Storage data source.
+     * Optional. A Cloud Storage data source.
      */
     gcsDataSource?: Schema$GcsData;
     /**
      * For transfers between file systems, specifies a Cloud Storage bucket to be used as an intermediate location through which to transfer data. See [Transfer data between file systems](https://cloud.google.com/storage-transfer/docs/file-to-file) for more information.
      */
     gcsIntermediateDataLocation?: Schema$GcsData;
     /**
-     * An HDFS cluster data source.
+     * Optional. An HDFS cluster data source.
      */
     hdfsDataSource?: Schema$HdfsData;
     /**
-     * An HTTP URL data source.
+     * Optional. An HTTP URL data source.
      */
     httpDataSource?: Schema$HttpData;
     /**
      * Only objects that satisfy these object conditions are included in the set of data source and data sink objects. Object conditions based on objects' "last modification time" do not exclude objects in a data sink.
      */
     objectConditions?: Schema$ObjectConditions;
     /**
-     * A POSIX Filesystem data sink.
+     * Optional. A POSIX Filesystem data sink.
      */
     posixDataSink?: Schema$PosixFilesystem;
     /**
-     * A POSIX Filesystem data source.
+     * Optional. A POSIX Filesystem data source.
      */
     posixDataSource?: Schema$PosixFilesystem;
     /**