docs(api): pending-endpoints brief for backend team

5 endpoints нужны admin-UI для завершения UI-фич:
  1. GET /dictionaries/{name}/changelog — History tab + TimeTravel
  2. GET /dictionaries/{name}/snapshots — TimeTravel slider marks
  3. POST drafts/.../{review,decision,publish} — workflow state machine
  4. PATCH /dictionaries/{name}/schema — Fields tab inline edit
  5. GET /dictionaries/graph/outgoing — catalog → FK count column

Каждый endpoint содержит: purpose, route, query/body, response example,
errors, frontend integration estimate. Total frontend work after backend
ship — ~14h (1.5 sprint day).

docs/toc.yaml

@@ -29,6 +29,8 @@ items:
         href: integration/api/best-practices.md
       - name: Bundle справочников cuod
         href: integration/api/bundle-cuod.md
+      - name: Pending endpoints (admin-UI wishlist)
+        href: integration/api/pending-endpoints.md
 
   - name: Прикладные сценарии
     items: