Document invitedBy field on User schema

[tommoor]

Summary

Adds a new invitedBy property to the User schema, mirroring the field added to the users.list response in outline/outline#13325. The field is a nested User object identifying who invited the user, and is only populated in responses to admin viewers.

Recent PRs Reviewed

Reviewed all pull requests merged in outline/outline over the last day (2026-08-07 → 2026-08-08). Most were internal fixes with no public API impact:

• #13345 (templates data) — bug fix only, existing schema already documents data as non-nullable
• #13344, #13343, #13342, #13334, #13335, #13336, #13341, #13333, #13329, #13331 — internal implementation details, no public schema changes
• #13332 (auth.info collaborationToken) — field was never documented in the spec (only issued to APP-type sessions)
• #13330 (suggestions.mention guest scoping) — endpoint not documented in the spec
• #13328 — internal rate-limiting change
• #13326, #13324 — UI-only
• #13325 — adds invitedBy to users.list response → documented in this PR

Test plan

• yarn validate passes
• spec3.json regenerated via pre-commit hook

---

Generated by Claude Code