[Flaky CI]: Cloudflare Integration Tests - suites/tracing/durableobject/test.ts > handles consecutive RPC calls without throwing "RPC receiver does not implement method" error

### Flakiness Type

Other / Unknown

### Name of Job

Cloudflare Integration Tests

### Name of Test

suites/tracing/durableobject/test.ts > handles consecutive RPC calls without throwing "RPC receiver does not implement method" error

### Link to Test Run

https://github.com/getsentry/sentry-javascript/actions/runs/31200588644/job/92939959271

---

_This issue was automatically created._

Start with suites/tracing/durableobject/test.ts and the linked Cloudflare Integration Tests run to inspect the failure. Re-run the named test and trace why consecutive RPC calls sometimes produce the reported receiver error; done means the test no longer flakes and completes without that error.

索引モデルが issue の本文から書いたものです。