ci: use SKIP TESTS marker for backend tests [SKIP TESTS]

.woodpecker/verify.yml

@@ -13,12 +13,13 @@ when:
   - event: push
     branch: dev
 
+# On Gitea PR events, CI_COMMIT_MESSAGE is the PR title.
 steps:
   - name: backend-tests
     image: bash
-    # [CI SKIP] omits tests only; web-build still runs.
+    # [SKIP TESTS] omits Backend tests only; web-build remains a dependent workflow.
     when:
-      - evaluate: 'not (CI_COMMIT_MESSAGE contains "[CI SKIP]")'
+      - evaluate: 'not (CI_COMMIT_MESSAGE contains "[SKIP TESTS]")'
     environment:
       NUGET_PACKAGES: /home/justme/.nuget/packages
     commands: