Function addSpanNote

addSpanNote(params: AddSpanNoteParams): Promise<{ id: string }>
Add a note to a span.

Notes are append-only: each call creates a new note with an auto-generated UUIDv4 identifier, so multiple notes accumulate on the same span. Structured annotations, by contrast, are keyed by (name, spanId, identifier) — to keep multiple structured annotations with the same name on a span, supply distinct identifiers; otherwise re-writing the same name overwrites the existing one.
Parameters
- params: AddSpanNoteParams
  The parameters to add a span note
Returns Promise<{ id: string }>
The ID of the created note annotation
Example
```
const result = await addSpanNote({
  spanNote: {
    spanId: "123abc",
    note: "This span looks suspicious, needs review"
  }
});
```
- Defined in packages/phoenix-client/src/spans/addSpanNote.ts:48