chore: fix type gen command

[RLesser]

:rocket:	This description was created by Ellipsis for commit 71ff2c6c9ae45fc1826b022f18a015d101f96186

Summary:

The PR updates the build-types script to generate more flexible types by changing empty object types from never to unknown in the generated src/type-gen/openapi.ts.

Key points:

• Updated build-types script in package.json to include --empty-objects-unknown flag.
• Modified src/type-gen/openapi.ts to change Record<string, never> to Record<string, unknown>.
• Affected components include atoms, BaseModel, hyperparameters, properties, datums, topic_model_metadatas, and results.
• Ensures generated types are more flexible for dynamic data structures.

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Generated with :heart: by ellipsis.dev

[RLesser]

• #74 👈
• main

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