ci(nx): enforce lockstep dependency versions

.github/workflows/ci.yml

@@ -147,6 +147,9 @@ jobs:
             - name: Install dependencies
               run: pnpm install --frozen-lockfile
 
+            - name: Validate Nx dependency version policy
+              run: pnpm run deps:nx:validate
+
             - name: Typecheck web and Electron entry points
               run: pnpm run typecheck:ci