Turbopack: prevent duplicate NFT modules (#84369)
Previously, you could have duplicate NFT modules (and duplicate analysis):
- user code ESM imports external `twoslash` which loads `typescript`
- user code CJS imports external `ts-morph` which loads `typescript`
Both cases would get different asset contexts, due to `externals_tracing_module_context(ExternalType::CommonJS)` vs `externals_tracing_module_context(ExternalType::Esm)`
<img width="2560" height="856" alt="Bildschirmfoto 2025-09-30 um 11 00 18" src="https://github.com/user-attachments/assets/7604783b-6e16-4b34-9af3-d8aa65a0cff8" />
