feat(aws-serverless): Set component as the function.aws segment name 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>

Author: Lms24

MIGRATION.md

@@ -998,7 +998,9 @@ their names are unchanged. The only new behaviour is the fallback: if neither th
 nor the `AWS_LAMBDA_FUNCTION_NAME` environment variable yields a function name, the span is named
 `Serverless function execution` instead of carrying an empty name. These spans continue to carry the
 function name on `faas.name`, the request URL on `url.full`, and the invocation details on
-`aws.lambda.*` and `aws.cloudwatch.logs.*`.
+`aws.lambda.*` and `aws.cloudwatch.logs.*`. Their `sentry.segment.name.source` is now `component`
+rather than `custom`, matching the other FaaS spans: the name comes from the function, not from the
+user. This applies in both trace lifecycles.
 
 #### Filtering and sampling
 

dev-packages/e2e-tests/test-applications/aws-serverless-layer/tests/layer.test.ts

@@ -36,7 +36,7 @@ test.describe('Lambda layer', () => {
     expect(transactionEvent.contexts?.trace).toEqual({
       data: {
         'sentry.sample_rate': 1,
-        'sentry.segment.name.source': 'custom',
+        'sentry.segment.name.source': 'component',
         'sentry.origin': 'auto.aws_lambda',
         'sentry.op': 'function.aws',
         'cloud.account.id': '012345678912',
@@ -107,7 +107,7 @@ test.describe('Lambda layer', () => {
     expect(transactionEvent.contexts?.trace).toEqual({
       data: {
         'sentry.sample_rate': 1,
-        'sentry.segment.name.source': 'custom',
+        'sentry.segment.name.source': 'component',
         'sentry.origin': 'auto.aws_lambda',
         'sentry.op': 'function.aws',
         'cloud.account.id': '012345678912',
@@ -233,7 +233,7 @@ test.describe('Lambda layer', () => {
     expect(transactionEvent.contexts?.trace).toEqual({
       data: {
         'sentry.sample_rate': 1,
-        'sentry.segment.name.source': 'custom',
+        'sentry.segment.name.source': 'component',
         'sentry.origin': 'auto.aws_lambda',
         'sentry.op': 'function.aws',
         'cloud.account.id': '012345678912',

dev-packages/e2e-tests/test-applications/aws-serverless/tests/npm.test.ts

@@ -18,7 +18,7 @@ function assertLambdaTrace(spans: SerializedStreamedSpan[], functionName: string
     'sentry.op': { value: 'function.aws', type: 'string' },
     'sentry.origin': { value: 'auto.aws_lambda', type: 'string' },
     'sentry.kind': { value: 'server', type: 'string' },
-    'sentry.segment.name.source': { value: 'custom', type: 'string' },
+    'sentry.segment.name.source': { value: 'component', type: 'string' },
     'cloud.account.id': { value: '012345678912', type: 'string' },
     'cloud.platform': { value: 'aws_lambda', type: 'string' },
     'cloud.provider': { value: 'aws', type: 'string' },

packages/aws-serverless/src/requestSpanOptions.ts

@@ -24,14 +24,15 @@ import {
   FAAS_NAME,
   SENTRY_KIND,
   SENTRY_OP,
+  SENTRY_ORIGIN,
+  SENTRY_SEGMENT_NAME_SOURCE,
   URL_FULL,
 } from '@sentry/conventions/attributes';
 import { FUNCTION_AWS } from '@sentry/conventions/op';
 import type { SpanAttributes, StartSpanOptions } from '@sentry/core';
 import {
   getClient,
   hasSpanStreamingEnabled,
-  SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   SERVERLESS_FUNCTION_SPAN_NAME_FALLBACK,
   filterCollectedUrl,
 } from '@sentry/core';
@@ -61,7 +62,8 @@ export function getRequestSpanOptions(event: unknown, context: Context, requestI
         : context.functionName,
     attributes: {
       [SENTRY_OP]: FUNCTION_AWS,
-      [SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN]: 'auto.aws_lambda',
+      [SENTRY_ORIGIN]: 'auto.aws_lambda',
+      [SENTRY_SEGMENT_NAME_SOURCE]: 'component',
       [SENTRY_KIND]: 'server',
       [ATTR_FAAS_EXECUTION]: context.awsRequestId,
       [ATTR_FAAS_ID]: context.invokedFunctionArn,