feat(ci): add golang test pipeline

Author: michelangelomo

.github/workflows/go-test.yml

@@ -0,0 +1,53 @@
+name: Go Tests
+
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - "backend/**"
+      - ".github/workflows/go-test.yml"
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: "1.23.4"
+          cache-dependency-path: backend/go.sum
+
+      - name: Cache Go modules
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('backend/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Download dependencies
+        working-directory: ./backend
+        run: go mod download
+
+      - name: Verify dependencies
+        working-directory: ./backend
+        run: go mod verify
+
+      - name: Run go vet
+        working-directory: ./backend
+        run: go vet ./...
+
+      - name: Run tests
+        working-directory: ./backend
+        run: go test -race -coverprofile=coverage.out ./...
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}