Photos are now step 2 of onboarding (right after basic info) instead
of only being manageable from the profile page later. Uploading still
goes through the existing /profile/photos endpoint; the new
POST /onboarding/photos just confirms at least one photo exists and
advances the step counter. Renumbered the OnboardingStep enum
accordingly (9 steps total now).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
mobiniqow
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