feat(migrationcenter): update the API

#### migrationcenter:v1

The following keys were added:
- schemas.BatchDeleteAssetsRequest.properties.cascadingRules.description
- schemas.BatchDeleteAssetsRequest.properties.cascadingRules.items.$ref
- schemas.BatchDeleteAssetsRequest.properties.cascadingRules.type
- schemas.CascadeLogicalDBsRule.description
- schemas.CascadeLogicalDBsRule.id
- schemas.CascadeLogicalDBsRule.type
- schemas.CascadingRule.description
- schemas.CascadingRule.id
- schemas.CascadingRule.properties.cascadeLogicalDbs.$ref
- schemas.CascadingRule.properties.cascadeLogicalDbs.description
- schemas.CascadingRule.type

Author: yoshi-automation

discovery/migrationcenter-v1.json

@@ -2407,7 +2407,7 @@
       }
     }
   },
-  "revision": "20250422",
+  "revision": "20250429",
   "rootUrl": "https://migrationcenter.googleapis.com/",
   "schemas": {
     "AddAssetsToGroupRequest": {
@@ -2890,6 +2890,13 @@
           "description": "Optional. When this value is set to `true` the request is a no-op for non-existing assets. See https://google.aip.dev/135#delete-if-existing for additional details. Default value is `false`.",
           "type": "boolean"
         },
+        "cascadingRules": {
+          "description": "Optional. Optional cascading rules for deleting related assets.",
+          "items": {
+            "$ref": "CascadingRule"
+          },
+          "type": "array"
+        },
         "names": {
           "description": "Required. The IDs of the assets to delete. A maximum of 1000 assets can be deleted in a batch. Format: projects/{project}/locations/{location}/assets/{name}.",
           "items": {
@@ -2966,6 +2973,23 @@
       "properties": {},
       "type": "object"
     },
+    "CascadeLogicalDBsRule": {
+      "description": "Cascading rule for related logical DBs.",
+      "id": "CascadeLogicalDBsRule",
+      "properties": {},
+      "type": "object"
+    },
+    "CascadingRule": {
+      "description": "Specifies cascading rules for traversing relations.",
+      "id": "CascadingRule",
+      "properties": {
+        "cascadeLogicalDbs": {
+          "$ref": "CascadeLogicalDBsRule",
+          "description": "Cascading rule for related logical DBs."
+        }
+      },
+      "type": "object"
+    },
     "ComputeEngineMigrationTarget": {
       "description": "Compute engine migration target.",
       "id": "ComputeEngineMigrationTarget",

src/apis/migrationcenter/v1.ts

@@ -445,6 +445,10 @@ export namespace migrationcenter_v1 {
      * Optional. When this value is set to `true` the request is a no-op for non-existing assets. See https://google.aip.dev/135#delete-if-existing for additional details. Default value is `false`.
      */
     allowMissing?: boolean | null;
+    /**
+     * Optional. Optional cascading rules for deleting related assets.
+     */
+    cascadingRules?: Schema$CascadingRule[];
     /**
      * Required. The IDs of the assets to delete. A maximum of 1000 assets can be deleted in a batch. Format: projects/{project\}/locations/{location\}/assets/{name\}.
      */
@@ -501,6 +505,19 @@ export namespace migrationcenter_v1 {
    * The request message for Operations.CancelOperation.
    */
   export interface Schema$CancelOperationRequest {}
+  /**
+   * Cascading rule for related logical DBs.
+   */
+  export interface Schema$CascadeLogicalDBsRule {}
+  /**
+   * Specifies cascading rules for traversing relations.
+   */
+  export interface Schema$CascadingRule {
+    /**
+     * Cascading rule for related logical DBs.
+     */
+    cascadeLogicalDbs?: Schema$CascadeLogicalDBsRule;
+  }
   /**
    * Compute engine migration target.
    */