feat: enhance architecture with service layer and error handling

.github/workflows/pr.yml

@@ -0,0 +1,32 @@
+name: Feature PR
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  unit-tests:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [22.x]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci --legacy-peer-deps
+
+      - name: Run unit tests
+        run: npm run test:ci
+        env:
+          CI: true

.npmrc

@@ -0,0 +1 @@
+legacy-peer-deps=true

.nvmrc

@@ -1 +1 @@
-v20
+22