What changed

Describe the developer-facing behavior this pull request changes.

Contract impact

• No public API contract change
• OpenAPI was changed in the private service repository and synchronized
• Fixtures and examples were updated to match the contract

Verification

• npm run verify
• npm run check:openapi-sync when the service repository is available
• npm run smoke:live for changes that affect public HTTP behavior
• No API keys, webhook secrets, private media URLs, or customer data added