fix(nestjs): Inline Observable type to resolve missing 'rxjs' dependency (#13166)

Author: nicohrubec

dev-packages/e2e-tests/test-applications/node-nestjs-basic/src/example.interceptor.ts

@@ -1,9 +1,10 @@
 import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from '@nestjs/common';
 import * as Sentry from '@sentry/nestjs';
+import { Observable } from 'rxjs';
 
 @Injectable()
 export class ExampleInterceptor implements NestInterceptor {
-  intercept(context: ExecutionContext, next: CallHandler) {
+  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
     Sentry.startSpan({ name: 'test-interceptor-span' }, () => {});
     return next.handle().pipe();
   }

packages/node/src/integrations/tracing/nest.ts

@@ -23,7 +23,6 @@ import {
 } from '@sentry/core';
 import type { IntegrationFn, Span } from '@sentry/types';
 import { addNonEnumerableProperty, logger } from '@sentry/utils';
-import type { Observable } from 'rxjs';
 import { generateInstrumentOnce } from '../../otel/instrument';
 
 interface MinimalNestJsExecutionContext {
@@ -61,6 +60,13 @@ const supportedVersions = ['>=8.0.0 <11'];
 
 const sentryPatched = 'sentryPatched';
 
+/**
+ * A minimal interface for an Observable.
+ */
+export interface Observable<T> {
+  subscribe(observer: (value: T) => void): void;
+}
+
 /**
  * A NestJS call handler. Used in interceptors to start the route execution.
  */