feat(examples): add Workflow Insight example

[wangyb-A]

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

Issue Link, if available

Depends on the Workflow Insight plugin merged in #661.

Description

Adds a customer-facing Workflow Insight example under the examples module. The handler registers an empty WorkflowInsightConfig so customers can see the minimum setup. The defaults use LambdaLogExporter, emit on completion, summarize top-level operations, and include input, output, and errors. Because the exporter writes to the function's own Lambda logs, the example requires no bucket, dedicated log group, or additional Lambda-role permissions.

Also adds local example coverage and a cloud integration assertion that invokes the deployed function, finds its uniquely correlated Workflow Insight record in CloudWatch Logs, accepts raw and structured Lambda log formats, and validates the emitted schema, status, content, and operation summaries.

Demo/Screenshots

Not applicable; this is a Java handler example and automated integration coverage with no UI changes.

Checklist

• I have filled out every section of the PR template
• I have thoroughly tested this change

Testing

• git diff --check
• mvn -B -q spotless:check --file pom.xml
• mvn -q -pl examples -am clean verify
• mvn -q clean verify
• Generated the SAM template to a scratch path and verified WorkflowInsightExampleFunction, its handler, managed log group, and workflow-insight-example suffix
• Retargeted to main so the normal Java 17/21/25 E2E workflow builds, deploys, invokes, and validates the cloud example

Unit Tests

Yes. WorkflowInsightExampleTest uses LocalDurableTestRunner to verify successful output, default input behavior, and both named operations.

Integration Tests

Yes. CloudBasedIntegrationTest#testWorkflowInsightExample uses the deployed durable function and polls its managed CloudWatch log group for the actual LambdaLogExporter record. The normal E2E workflow is now running against this PR head.

Examples

Yes. WorkflowInsightExample demonstrates the minimum Workflow Insight plugin configuration with zero additional deployment infrastructure.

[wangyb-A]

/ai review

[github-actions]

Codex AI review

No actionable findings. Residual risk is limited to CloudWatch ingestion and Lambda log-envelope variations, which are covered only by the cloud-gated test.

Reviewed commit 3de314d40760ed25ade62c99321196ebb0007da0. Workflow run