docs(api): generate auth docs and archive p00 change

backend/.scribe/auth.md

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+# Authenticating requests
+
+To authenticate requests, include an **`Authorization`** header with the value **`"Bearer Bearer {token}"`**.
+
+All authenticated endpoints are marked with a `requires authentication` badge in the documentation below.
+
+Get tokens from `POST /api/auth/login`, send access token as `Bearer {token}`, and renew with `POST /api/auth/refresh` before access token expiry.