grpcurl -plaintext \
  -d '{
    "profile_name": "default",
    "table_name": "2025_customer"
  }' \
  localhost:50051 \
  komp_ac.table_structure.TableStructureService/GetTableStructure
{
  "columns": [
    {
      "name": "id",
      "dataType": "INT8",
      "isPrimaryKey": true
    },
    {
      "name": "deleted",
      "dataType": "BOOL"
    },
    {
      "name": "full_name",
      "dataType": "TEXT",
      "isNullable": true
    },
    {
      "name": "email",
      "dataType": "VARCHAR(255)",
      "isNullable": true
    },
    {
      "name": "loyalty_status",
      "dataType": "BOOL",
      "isNullable": true
    },
    {
      "name": "created_at",
      "dataType": "TIMESTAMPTZ",
      "isNullable": true
    }
  ]
}
