feat(aws-serverless): Emit low cardinality function.aws span names - #24072
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`function.aws` spans were already named after the Lambda function, which is what the
`{{faas.name}}` template in the Sentry span name conventions asks for, so their names do
not change. What was missing is the conventions' static fallback: when the invocation
context carries no function name, the span was started with an empty name and `faas.name`
was left unset.
Resolve the function name from `context.functionName` or the `AWS_LAMBDA_FUNCTION_NAME`
environment variable, use it for both the span name and `faas.name`, and fall back to
`Serverless function execution` under span streaming. Without span streaming the name stays
byte-identical to before.
Refs #23954
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
`requestSpanOptions.test.ts` asserted the start-span options object against a mocked client. The `aws-serverless` e2e app now runs on span streaming and covers the same ground against a real Lambda, so the unit tests only duplicated it. The one branch e2e cannot reach is the `Serverless function execution` fallback: Lambda always populates `context.functionName`. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
…ame source `function.aws` spans left `sentry.segment.name.source` unset, so it defaulted to `custom` — which claims the user named the span. The name comes from the Lambda function, so `component` is what it is, and it matches the other FaaS spans. Applies in both trace lifecycles, so the static layer suite and the streamed npm suite are updated alongside it. Refs #23954 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Small adjustment: When streaming is enabled and we can't get a function name, we fall back to the string name.
Additionally, added the
sentry.segment.name.sourceattribute which was missing previously, in line with GCP, set toroute. Other than that the span name already fitted conventions, so no more changes necessary.To test, this converts the AWS Lambda test to span streaming. The other (layer one) is unchanged, to be converted later.
ref #23954