add tests for common to workflow

.github/workflows/deploy.yml

@@ -15,6 +15,21 @@ env:
   WORKSPACE_ARTIFACT_CDK: 'explore_flights_cdk_artifact'
 
 jobs:
+  test_common:
+    name: 'Test common'
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@v4
+      - name: 'Setup go'
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go/common/go.mod'
+          cache-dependency-path: 'go/common/go.sum'
+      - name: 'Test'
+        working-directory: 'go/common'
+        run: 'go test ./...'
+
   build_and_test_api:
     name: 'Build and test API'
     runs-on: ubuntu-latest
@@ -132,6 +147,7 @@ jobs:
     name: 'Build and synth cdk'
     runs-on: ubuntu-latest
     needs:
+      - test_common
       - build_and_test_api
       - build_and_test_cron
       - build_ui