curl --request POST \
  --url http://localhost:8000/v1/knowledge/search \
  --header 'Content-Type: application/json' \
  --data '
{
  "user_id": "alice",
  "query": "remote work policy",
  "top_k": 5
}
'

{
  "chunks": [
    {
      "chunk_id": "kb_3f7a1c2d9e4b_chunk_1",
      "kb_id": "kb_3f7a1c2d9e4b",
      "content": "Remote work is allowed up to 3 days per week.",
      "score": 0.92
    }
  ]
}