fix: apply code-review and insight findings across nuntius

.gitea/workflows/test.yml

@@ -22,7 +22,13 @@ jobs:
       - name: gofmt
         # `gofmt -l` prints the names of unformatted files. An empty
         # output is the only acceptable result.
-        run: gofmt -l cmd internal pkg
+        run: |
+          unformatted=$(gofmt -l cmd internal pkg)
+          if [ -n "$unformatted" ]; then
+            echo "The following files need gofmt:"
+            echo "$unformatted"
+            exit 1
+          fi
 
       - name: go vet
         run: go vet ./...
@@ -45,3 +51,25 @@ jobs:
 
       - name: go test ./examples
         run: go build ./examples/...
+
+  build:
+    runs-on: fedora
+    needs: test
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.26"
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Build
+        run: go build -ldflags="-s -w" -o bin/nuntius ./cmd/server
+
+      - name: Test
+        run: go test ./...
+
+      - name: Smoke test
+        run: ./bin/nuntius --version