Function addDocumentAnnotation

addDocumentAnnotation(
params: AddDocumentAnnotationParams,
): Promise<{ id: string } | null>
Add an annotation to a document within a span.

The annotation can be of type "LLM", "CODE", or "HUMAN" and can include a label, score, explanation, and metadata. At least one of label, score, or explanation must be provided.
Parameters
- params: AddDocumentAnnotationParams
  The parameters to add a document annotation
Returns Promise<{ id: string } | null>
The ID of the created annotation
Example
```
const result = await addDocumentAnnotation({
  documentAnnotation: {
    spanId: "123abc",
    documentPosition: 0,
    name: "relevance_score",
    label: "relevant",
    score: 0.95,
    annotatorKind: "LLM",
    explanation: "Document is highly relevant to the query",
    metadata: {
      model: "gpt-4"
    }
  }
});
```
- Defined in packages/phoenix-client/src/spans/addDocumentAnnotation.ts:46