chore(triage): record API-docs SSO as out of scope

.out-of-scope/docs-sso.md

@@ -0,0 +1,23 @@
+# SSO integration with the API docs
+
+The docs surface stays anonymous. There is no plan to wire the forum's SSO into
+the Scalar docs page so logged-in members get a different experience.
+
+## Why this is out of scope
+
+The payoff was never pinned down. The request that raised it (#216) was an open
+placeholder — scope, behavior, and implementation all undecided — with no
+concrete member-facing benefit that being logged in would unlock on a static API
+reference page. Weighed against the work to put a session layer on a surface
+that is currently static embedded assets (`rest.DocsHandler` serves the vendored
+Scalar bundle and the spec verbatim, no cookies, no session), the juice isn't
+worth the squeeze.
+
+This is a value call, not a technical impossibility. If a real, member-facing
+reason for logged-in docs ever turns up, delete this file and let it go through
+triage fresh.
+
+## Prior requests
+
+- #216 — "Investigate SSO integration with the API docs" (placeholder, closed
+  out-of-scope 2026-06-29)