Align auth registration with server client_type

Author: jwfing

insforge/auth/client.py

@@ -126,6 +126,7 @@ async def create_user(
         response = await self._client._request_json(
             "POST",
             "/api/auth/users",
+            params={"client_type": "server"},
             json=payload,
             exception_cls=InsforgeAuthError,
         )

tests/auth/test_auth_client.py

@@ -257,6 +257,7 @@ async def fake_request(method: str, url: httpx.URL, **kwargs: object) -> httpx.R
 
     assert calls[3]["method"] == "POST"
     assert calls[3]["url"] == "https://example.com/api/auth/users"
+    assert calls[3]["kwargs"]["params"] == {"client_type": "server"}
     assert calls[3]["kwargs"]["json"] == {
         "email": "b@example.com",
         "password": "secret123",