bug/ Server Error when creating Snowflake connector

Describe the bug

When attempting to create a Snowflake source connector with minimum viable configuration, the server returns a 500 status.

To Reproduce

With HTTPie:

$ http -jv POST https://platform.unstructuredapp.io/api/v1/sources/ unstructured-api-key:$UNSTRUCTURED_API_KEY name=test-snowflake-connector type=snowflake config:='{"account":"foo", "role":"foo", "user":"foo", "password":"foo", "host":"foo.snowflakecomputing.com", "database":"foo", "table_name":"foo", "id_column":"foo"}'

POST /api/v1/sources/ HTTP/1.1
Accept: application/json, */*;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Content-Length: 234
Content-Type: application/json
Host: platform.unstructuredapp.io
User-Agent: HTTPie/3.2.4
unstructured-api-key: ****

{
    "config": {
        "account": "foo",
        "database": "foo",
        "host": "foo.snowflakecomputing.com",
        "id_column": "foo",
        "password": "foo",
        "role": "foo",
        "table_name": "foo",
        "user": "foo"
    },
    "name": "test-snowflake-connector",
    "type": "snowflake"
}

HTTP/1.1 500 Internal Server Error
content-length: 21
content-type: text/plain; charset=utf-8
date: Thu, 21 Aug 2025 13:33:59 GMT
server: istio-envoy
x-envoy-upstream-service-time: 104

Internal Server Error

Expected behavior

Either a validation error message or a successfully created connector.

Additional context

Documentation for the Snowflake connector seems to indicate that the above request should be valid.

Bắt đầu tại endpoint POST /api/v1/sources/ và tái hiện request Snowflake bằng cấu hình tối thiểu được tài liệu hóa. Kiểm tra đường dẫn tạo Snowflake connector và xác nhận rằng request либо tạo connector hoặc trả về lỗi xác thực thay vì HTTP 500.