Creates a project affiliate row (managed affiliate) for the project resolved from the API key.
Returns the same enriched shape as GET /v1/project-affiliates/{projectAffiliateId} (tiers, protections, audiences, tax).

When to use

• Server-side or automation onboarding of affiliates without wallet signatures
• Bulk provisioning from CRM or internal tools

When NOT to use

• Self-serve affiliate code signup (use POST /v1/affiliates with signatures)

Tier approvals

approve_project_tier_ids may list any project tiers; only tiers that require manual project approval are approved.
If at least one listed tier requires manual approval, send reviewed_by_user_id (project member). Duplicate ids are de-duplicated.

When tier_protection targets a tier that requires manual approval, also send reviewed_by_user_id so the API can record the approval on create (same outcome as the dashboard save flow).

Tier protection

Optional tier_protection: provide exactly one of expires_at (ISO 8601) or protection_days (1–365), plus tier_id.

Rate limits

Standard project API key limits apply (100 requests/minute unless otherwise configured).