fix(core): stabilize editor lifecycle, transactional versions, and runtime config

backend/README.md

@@ -15,19 +15,15 @@ Backend for SVG scheme upload, draft editing, pricing, diagnostics, publish prev
 Default backend port: `9020`
 
 Health check:
-
 - `GET /healthz`
 
 Main API prefix:
-
 - `/api/v1`
 
 Auth header:
-
 - `X-API-Key`
 
 Default local admin key:
-
 - `admin-local-dev-key`
 
 ## Core lifecycle
@@ -254,9 +250,11 @@ on every mutation route.
 
 ## Regression
 
-Main operator regression:
+Main operator regressions:
 - `backend/scripts/smoke_regression.sh`
+- `backend/scripts/editor_mutation_regression.sh`
 
 Run:
 `API_URL=http://127.0.0.1:9020 API_KEY=admin-local-dev-key SCHEME_ID=... ./backend/scripts/smoke_regression.sh`
 
+`API_URL=http://127.0.0.1:9020 API_KEY=admin-local-dev-key SCHEME_ID=... ./backend/scripts/editor_mutation_regression.sh`