fix(neptune-alpha): multiple cloudwatchLogsExports cannot be set when configuring log retention (#28643)

This PR includes a breaking change to the aws-neptune-alpha module.

I have resolved an issue where it was not possible to set multiple `cloudwatchLogsExports` when configuring log retention for a `DatabaseCluster`.

The root cause of the problem was that the LogRetention creation included `[object object]` in the construct's ID. With the current fix, the given `logType` can now be correctly included in the `LogRetention`.
```diff
- new logs.LogRetention(this, `${logType}LogRetention`, {..} // "DatabaseobjectObjectLogRetentionA247AF0C"
+ new logs.LogRetention(this, `${logType.value}LogRetention`, {..} // "DatabaseauditLogRetention8A29F5CC"
```

BREAKING CHANGE: Corrected LogRetention IDs for DatabaseCluster. Previously, regardless of the log type, the string ‘objectObject’ was always included, but after the correction, the log type is now included.


Closes #26295.

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: badmintoncryer

packages/@aws-cdk/aws-neptune-alpha/lib/cluster.ts

@@ -633,7 +633,7 @@ export class DatabaseCluster extends DatabaseClusterBase implements IDatabaseClu
     const retention = props.cloudwatchLogsRetention;
     if (retention) {
       props.cloudwatchLogsExports?.forEach(logType => {
-        new logs.LogRetention(this, `${logType}LogRetention`, {
+        new logs.LogRetention(this, `${logType.value}LogRetention`, {
           logGroupName: `/aws/neptune/${this.clusterIdentifier}/${logType.value}`,
           role: props.cloudwatchLogsRetentionRole,
           retention,

packages/@aws-cdk/aws-neptune-alpha/test/cluster.test.ts

@@ -830,6 +830,55 @@ describe('DatabaseCluster', () => {
       });
     }).toThrow(/ServerlessScalingConfiguration minCapacity 10 must be less than serverlessScalingConfiguration maxCapacity 5/);
   });
+
+  test('cloudwatchLogsExports log retention is enabled when configured for multiple logs exports', () => {
+    // GIVEN
+    const stack = testStack();
+    const vpc = new ec2.Vpc(stack, 'VPC');
+
+    // WHEN
+    new DatabaseCluster(stack, 'Cluster', {
+      vpc,
+      instanceType: InstanceType.R5_LARGE,
+      cloudwatchLogsExports: [LogType.AUDIT, new LogType('slowquery')],
+      cloudwatchLogsRetention: logs.RetentionDays.ONE_MONTH,
+    });
+
+    // THEN
+    Template.fromStack(stack).hasResourceProperties('AWS::Neptune::DBCluster', {
+      EnableCloudwatchLogsExports: ['audit', 'slowquery'],
+    });
+    Template.fromStack(stack).hasResourceProperties('Custom::LogRetention', {
+      LogGroupName: {
+        'Fn::Join': [
+          '',
+          [
+            '/aws/neptune/',
+            {
+              Ref: 'ClusterEB0386A7',
+            },
+            '/audit',
+          ],
+        ],
+      },
+      RetentionInDays: 30,
+    });
+    Template.fromStack(stack).hasResourceProperties('Custom::LogRetention', {
+      LogGroupName: {
+        'Fn::Join': [
+          '',
+          [
+            '/aws/neptune/',
+            {
+              Ref: 'ClusterEB0386A7',
+            },
+            '/slowquery',
+          ],
+        ],
+      },
+      RetentionInDays: 30,
+    });
+  });
 });
 
 function testStack() {

packages/@aws-cdk/aws-neptune-alpha/test/integ.cluster.js.snapshot/ClusterTestDefaultTestDeployAssert6A1BBA9D.assets.json

@@ -430,7 +430,7 @@
    "Type": "AWS::Neptune::DBClusterParameterGroup",
    "Properties": {
     "Description": "A nice parameter group",
-    "Family": "neptune1",
+    "Family": "neptune1.2",
     "Parameters": {
      "neptune_enable_audit_log": "1",
      "neptune_query_timeout": "100000"
@@ -505,6 +505,7 @@
     "EnableCloudwatchLogsExports": [
      "audit"
     ],
+    "EngineVersion": "1.2.1.0",
     "KmsKeyId": {
      "Fn::GetAtt": [
       "DbSecurity381C2C15",
@@ -524,7 +525,7 @@
    "UpdateReplacePolicy": "Delete",
    "DeletionPolicy": "Delete"
   },
-  "DatabaseobjectObjectLogRetentionA247AF0C": {
+  "DatabaseauditLogRetention8A29F5CC": {
    "Type": "Custom::LogRetention",
    "Properties": {
     "ServiceToken": {
@@ -631,7 +632,7 @@
      "S3Bucket": {
       "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
      },
-     "S3Key": "a8515c042d9c942705087943220417be929ac44f968d8fcef2681681b400c0c0.zip"
+     "S3Key": "e4afb15788ec44ed9ff3377e1d131ba2768d7b2e2931bc000d1f2005879b3035.zip"
     },
     "Role": {
      "Fn::GetAtt": [