[SVLS-8583] Add execution_status tag to aws.lambda span for durable functions

[lym953]

Summary

• Adds aws_lambda.durable_function.execution_status tag to the aws.lambda span for durable function invocations
• Tag is set from result.Status in the handler response; valid values are SUCCEEDED, FAILED, PENDING (matching the InvocationStatus enum in the durable execution SDK)
• Applied whenever the event contains a DurableExecutionArn, independent of whether ARN parsing succeeds
• Mirrors the implementation in the Python tracer: feat: add durable_function_execution_status tag to aws.lambda span datadog-lambda-python#751

Automated testing

• Unit tests added for extractDurableExecutionStatus in durable-function-context.spec.ts covering all valid statuses, invalid status, missing status, null result, and non-durable events
• Tests added in listener.spec.ts to verify the status tag is set when result.Status is valid and not set otherwise
• All tests pass

Manual testing

Tested with a durable function which has 2 invocations in an execution.

The aws.lambda span for the 1st invocation has tag execution_status:PENDING (link)

For the 2nd invocation, the tag is execution_status:FAILED (link) or execution_status:SUCCEEDED (link)

Note

Before an execution finishes (either fails or succeeds), the status is shown as RUNNING, even if the execution is paused. I'm planning to do the same on our UI, so the PENDING status won't be used, but still adding it as a tag because it's also informative as a tag itself.

Next steps

1. Do the same thing for Python tracer. Right now Python tracer expects STOPPED and TIMED_OUT statuses (among others) from durable execution SDK, which is wrong. We should remove them and add PENDING.
2. Build UI

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds durable-function execution status tagging to the aws.lambda span so downstream trace analysis can distinguish outcomes of durable function invocations.

Changes:

• Add aws_lambda.durable_function.execution_status tag extraction based on result.Status for durable events.
• Introduce extractDurableExecutionStatus helper with validation of allowed status values.
• Add unit tests for extractDurableExecutionStatus.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/trace/listener.ts	Sets the new durable execution status tag on the active aws.lambda span during invocation teardown.
src/trace/durable-function-context.ts	Adds validated extraction of durable execution status from handler result.
src/trace/durable-function-context.spec.ts	Adds test coverage for the new status-extraction helper.

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[litianningdatadog]

Stamped. Please watch out the e2e failure

[lym953]

E2E test deployment keeps failing with error ValidationError: Circular dependency between resources. Ignoring it and merging this PR.