bun: `Sentry.init()` throws when `@sentry/bun` is loaded with `require()`

[JPeer264]

With the CommonJS build of @sentry/bun, Sentry.init() throws in the default bunHttpServerIntegration:

// repro.cjs, run with `bun repro.cjs`
const Sentry = require('@sentry/bun');

Sentry.init({ dsn: 'https://public@dsn.ingest.sentry.io/1337' });
console.log('init ok'); // never printed

TypeError: undefined is not an object (evaluating 'http.default.Server')
    at instrumentBunHttpServer (packages/bun/build/cjs/integrations/bunHttpServer.js:42)
    at setupOnce (packages/bun/build/cjs/integrations/bunHttpServer.js:15)

Reproduced on Bun 1.3.14 (the CI version) and 1.4.2, on develop (10.67.0). The ESM build (import * as Sentry from '@sentry/bun') is not affected.

Cause. packages/bun/src/integrations/bunHttpServer.ts:2-3 uses default imports (import http from 'node:http', import https from 'node:https'). Rollup emits const http = require('node:http') and then reads http.default.Server (build/cjs/integrations/bunHttpServer.js:42-44). In CommonJS, Bun's node:http has no default property, so init() throws. The integration is in the default set (packages/bun/src/sdk.ts:69), so every require('@sentry/bun') user is affected, not only users of node:http servers.

Work item. Use namespace imports (import * as http from 'node:http'), or fix the CJS interop in the build. Add a regression test that loads @sentry/bun with require() and calls init(), because the existing Bun integration tests use only ESM.

How it was found. The POC that runs the Node integration suites on Bun with @sentry/node mapped to @sentry/bun (#24052) ran public-api/OnUncaughtException/basic.js, a CommonJS scenario. The error event contained this TypeError in place of the expected Error: foo. The bug came in with #22870.

[linear-code]

JS-3746