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.

POST /api/v1/sources/ エンドポイントから開始し、文書化されている最小構成を使って Snowflake リクエストを再現します。Snowflake コネクターの作成パスを確認し、リクエストによってコネクターが作成されるか、HTTP 500 ではなくバリデーションエラーが返されることを確認します。