Agent knowledge base documents

curl --request POST \
  --url https://app.phonely.ai/api/agent-documents \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-Authorization: <api-key>' \
  --form 'uid=<string>' \
  --form 'agentId=<string>' \
  --form 'files=[
  null
]'

{
  "message": "<string>",
  "documentIds": [
    "<string>"
  ]
}