bug: `POST /api/platform/v1/mentees` returns 500 when an existing mentee resubmits without `profileStatus` in the body

[nora-weisser]

Problem

On the update path (existing mentee, looked up by email), the service calls ProfileStatus.getStatusId() on the request's profileStatus field. The mentee form on the website don't send this field, so on any second submission or the submission from the mentee who participate in long-term for the same email the call dereferences null and the request fails with a generic 500 Internal Server Error.

Evidence

Second POST /mentees against the same email, without profileStatus:

{
  "timestamp": "...",
  "status": 500,
  "error": "Internal Server Error",
  "path": "/api/platform/v1/mentees"
}

Server log:

java.lang.NullPointerException: Cannot invoke
  "com.wcc.platform.domain.platform.member.ProfileStatus.getStatusId()"
  because "profileStatus" is null

Adding "profileStatus": "PENDING" to the body lets the same request succeed (201).