Upload Document to Knowledge Base

curl --request POST \
  --url https://api.wacht.dev/ai-knowledge-bases/{kb_id}/documents \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'metadata={}' \
  --form file=@example-file

{
  "id": "<string>",
  "knowledge_base_id": "<string>",
  "name": "user-manual.pdf",
  "type": "pdf",
  "size": 2048576,
  "token_count": 15000,
  "status": "ready",
  "uploaded_at": "2023-11-07T05:31:56Z"
}