Run Review Apps in MRs that change app/models

Also update docs

.gitlab/ci/rules.gitlab-ci.yml

@@ -229,6 +229,9 @@
 .controllers-patterns: &controllers-patterns
   - "{,ee/,jh/}{app/controllers}/**/*"
 
+.models-patterns: &models-patterns
+  - "{,ee/,jh/}{app/models}/**/*"
+
 .startup-css-patterns: &startup-css-patterns
   - "{,ee/,jh/}app/assets/stylesheets/startup/**/*"
 
@@ -1616,6 +1619,8 @@
       changes: *frontend-patterns
     - <<: *if-dot-com-gitlab-org-merge-request
       changes: *controllers-patterns
+    - <<: *if-dot-com-gitlab-org-merge-request
+      changes: *models-patterns
     - <<: *if-dot-com-gitlab-org-merge-request
       changes: *qa-patterns
     - <<: *if-dot-com-gitlab-org-merge-request

doc/development/testing_guide/review_apps.md

@@ -15,6 +15,7 @@ For any of the following scenarios, the `start-review-app-pipeline` job would be
 - for merge requests with CI config changes
 - for merge requests with frontend changes
 - for merge requests with changes to `{,ee/,jh/}{app/controllers}/**/*`
+- for merge requests with changes to `{,ee/,jh/}{app/models}/**/*`
 - for merge requests with QA changes
 - for scheduled pipelines
 - the MR has the `pipeline:run-review-app` label set