fix(v10/sveltekit): add op and origin to Kit's sveltekit.endpoint span (#25429)

Backport of: #25376

## Differences to the original PR

- `packages/sveltekit/src/server-common/integrations/svelteKitSpans.ts`:
v10's span mapping returns `{ op, origin }` instead of only an origin,
so the endpoint case returns `{ op: 'function.sveltekit.endpoint',
origin: 'auto.function.sveltekit.endpoint' }`. Unit and e2e test
expectations were adjusted to match.

This branch was prepared by the v10 backport automation, which was
blocked at PR creation; it's opened manually now.

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via **Jan Peer Stöcklmair**.
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---------

Co-authored-by: sentry-junior[bot] <264270552+sentry-junior[bot]@users.noreply.github.com>
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>

Author: sentry-junior[bot]

dev-packages/e2e-tests/test-applications/sveltekit-3/tests/tracing.server.test.ts

@@ -31,7 +31,7 @@ test('server pageload request span has nested request span for sub request', asy
     },
   });
 
-  expect(spans).toHaveLength(6);
+  expect(spans).toHaveLength(7);
 
   expect(spans).toEqual(
     expect.arrayContaining([
@@ -120,6 +120,21 @@ test('server pageload request span has nested request span for sub request', asy
         origin: 'auto.http.sveltekit',
         status: 'ok',
       }),
+
+      // sub request `+server` handler span (emitted by Kit since 3.1.0).
+      // Its op is inferred as `http` from `http.method` before the integration runs, and v10 keeps existing ops.
+      expect.objectContaining({
+        data: expect.objectContaining({
+          'http.route': '/api/users',
+          'http.method': 'GET',
+          'sentry.op': 'http',
+          'sentry.origin': 'auto.function.sveltekit.endpoint',
+        }),
+        description: 'sveltekit.endpoint',
+        op: 'http',
+        origin: 'auto.function.sveltekit.endpoint',
+        status: 'ok',
+      }),
     ]),
   );
 

packages/sveltekit/src/server-common/integrations/svelteKitSpans.ts

@@ -82,6 +82,8 @@ function _getKitSpanEnhancement(spanName: string | undefined): {
       return { op: 'function.sveltekit.load', origin: 'auto.function.sveltekit.load' };
     case 'sveltekit.form_action':
       return { op: 'function.sveltekit.form_action', origin: 'auto.function.sveltekit.action' };
+    case 'sveltekit.endpoint':
+      return { op: 'function.sveltekit.endpoint', origin: 'auto.function.sveltekit.endpoint' };
     case 'sveltekit.remote.call':
       return { op: 'function.sveltekit.remote', origin: 'auto.rpc.sveltekit.remote' };
     case 'sveltekit.handle.root':

packages/sveltekit/test/server-common/integrations/svelteKitSpans.test.ts

@@ -56,6 +56,7 @@ describe('svelteKitSpansIntegration', () => {
       ['sveltekit.resolve', 'function.sveltekit.resolve', 'auto.http.sveltekit'],
       ['sveltekit.load', 'function.sveltekit.load', 'auto.function.sveltekit.load'],
       ['sveltekit.form_action', 'function.sveltekit.form_action', 'auto.function.sveltekit.action'],
+      ['sveltekit.endpoint', 'function.sveltekit.endpoint', 'auto.function.sveltekit.endpoint'],
       ['sveltekit.remote.call', 'function.sveltekit.remote', 'auto.rpc.sveltekit.remote'],
       ['sveltekit.handle.sequenced.0', 'function.sveltekit.handle', 'auto.function.sveltekit.handle'],
       ['sveltekit.handle.sequenced.myHandler', 'function.sveltekit.handle', 'auto.function.sveltekit.handle'],
@@ -194,6 +195,7 @@ describe('svelteKitSpansIntegration', () => {
       ['sveltekit.resolve', 'function.sveltekit.resolve', 'auto.http.sveltekit'],
       ['sveltekit.load', 'function.sveltekit.load', 'auto.function.sveltekit.load'],
       ['sveltekit.form_action', 'function.sveltekit.form_action', 'auto.function.sveltekit.action'],
+      ['sveltekit.endpoint', 'function.sveltekit.endpoint', 'auto.function.sveltekit.endpoint'],
       ['sveltekit.remote.call', 'function.sveltekit.remote', 'auto.rpc.sveltekit.remote'],
       ['sveltekit.handle.sequenced.0', 'function.sveltekit.handle', 'auto.function.sveltekit.handle'],
       ['sveltekit.handle.sequenced.myHandler', 'function.sveltekit.handle', 'auto.function.sveltekit.handle'],