Update CI workflow to install CGO dependencies for Go builds

- Add step to install GCC for CGO support in the CI pipeline
- Set CGO_ENABLED environment variable to enable CGO during testing

.gitea/workflows/ci.yml

@@ -65,6 +65,10 @@ jobs:
         with:
           go-version: '1.25.3'
           cache: true
+      - name: Install CGO dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc
       - name: Install dependencies
         working-directory: bugulma/backend
         run: go mod download
@@ -112,6 +116,7 @@ jobs:
         run: go test -v -race -coverprofile=coverage.out ./...
         env:
           GO111MODULE: on
+          CGO_ENABLED: 1
           GOPROXY: https://proxy.golang.org,direct
           GOSUMDB: sum.golang.org
       - name: Coverage