"contentMediaType":"application/octet-stream" is represented as a `string`, rather than a `Blob`

[chrisweight]

Newer versions of FastAPI fully integrate with Pydantic v2 and OpenAPI 3.1.0 JSON Schemas. With these changes, file uploads representing UploadFile are natively represented with "contentMediaType": "application/octet-stream" rather than using the legacy format: binary.

Since ng-openapi-gen still requires "format": "binary" to generate the Blob type correctly in TypeScript, it fell back to outputting a string without it.