Add integration tests for durable function execution status tag (SVLS-8583)

[jchrostek-dd]

What

Adds integration tests for the aws_lambda.durable_function.execution_status tag added to the aws.lambda span in datadog-lambda-js (PR #763).

Why

Integration tests validate that the tag is set correctly when a Node.js Lambda function is invoked with a durable execution event, and that the guard prevents the tag from being set on non-durable invocations.

Changes

• integration-tests/lambda/svls-8583-node/index.js — Handler that returns {Status: process.env.RETURN_STATUS} with optional DurableExecutionArn in the event
• integration-tests/lib/stacks/svls-8583.ts — CDK stack with 3 Lambda functions (durable-succeeded, durable-failed, non-durable)
• integration-tests/tests/svls-8583.test.ts — 9 test cases covering 3 scenarios
• integration-tests/bin/app.ts — Registered Svls8583Stack

Test Scenarios (9 tests)

1. durable-succeeded — invoked with DurableExecutionArn in event, returns {Status: "SUCCEEDED"} → asserts tag aws_lambda.durable_function.execution_status=SUCCEEDED
2. durable-failed — invoked with DurableExecutionArn in event, returns {Status: "FAILED"} → asserts tag aws_lambda.durable_function.execution_status=FAILED
3. non-durable — invoked without DurableExecutionArn, returns {Status: "SUCCEEDED"} → asserts tag is absent (guard test)

All 9 tests passed against real Lambda functions deployed to AWS.

Related

• Jira: SVLS-8583
• Parent: SVLS-8492 (Lambda Durable Functions execution)
• Implementation PR: Add durable_function_execution_status tag to aws.lambda span datadog-lambda-js#763