feat (OPE-943): Add CI checks for yarn file (#1371)

* ci: add yarn-lock-check workflow to validate root and frontend yarn.lock files

* ci: refine yarn-lock-check workflow

* Potential fix for code scanning alert no. 35: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

* test: empty yarn.lock file

* test: no yarn.lock file

* test: added yarn.lock file

* ci: merge yarn.lock validation into Frontend workflow and remove standalone check

---------

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: mohandast52

.github/workflows/frontend.yml

@@ -1,28 +1,64 @@
-# TBA
 name: Frontend
 
-on: [pull_request]
+permissions:
+  contents: read
+
+on:
+  pull_request:
+  push:
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      # Node
+      
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
           node-version: "20.x"
 
+      # Validate yarn.lock files first
+      - name: Ensure root yarn.lock exists and is valid
+        run: |
+          if [ ! -f "yarn.lock" ]; then
+            echo "Error: Missing root yarn.lock."
+            echo "Run 'yarn install' and commit the generated lockfile."
+            exit 1
+          fi
+
+          if [ ! -s "yarn.lock" ]; then
+            echo "Error: Root yarn.lock exists but is empty."
+            exit 1
+          fi
+
+          yarn install --immutable
+
+      - name: Ensure frontend yarn.lock exists and is valid
+        run: |
+          if [ ! -f "frontend/yarn.lock" ]; then
+            echo "Error: Missing frontend/yarn.lock."
+            echo "Run 'cd frontend && yarn install' and commit the generated lockfile."
+            exit 1
+          fi
+
+          if [ ! -s "frontend/yarn.lock" ]; then
+            echo "Error: frontend/yarn.lock exists but is empty."
+            exit 1
+          fi
+
+          cd frontend
+          yarn install --immutable
+
       # Configure Yarn network settings for timeout, retries, and reduced concurrency
       - name: Configure Yarn network settings
         run: |
           yarn config set network-timeout 60000         # Set network timeout to 1 minute
           yarn config set network-retries 10             # Retry up to 10 times
           yarn config set network-concurrency 2          # Reduce concurrency to 2 connections
 
-      # Install dependencies
+      # Install dependencies (this should be fast since we already validated with --immutable)
       - name: Install dependencies
         run: yarn install:frontend