POST /delete

{
  "index_name": "my_index",
  "external_ids": ["item_001", "item_002", "item_003"],
  "return_not_found": false
}

{
  "deleted_count": 2,
  "not_found": ["item_003"]
}

POST /rebuild

{
  "index_name": "my_index",
  "params": {
    "M": 48,
    "ef_construction": 1024,
    "ef_search": 512,
    "rng_seed": 0
  }
}

{
  "success": true,
  "message": "Index 'my_index' rebuilt and compacted",
  "index_name": "my_index"
}

POST /optimize

{
  "index_name": "my_index"
}

{
  "success": true,
  "message": "Graph optimized for index 'my_index'",
  "index_name": "my_index"
}