fix coverage not showing inter-package coverage and add race flag

.github/workflows/go.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.21
+        go-version: 1.25
 
     - name: Build
       run: go build -v ./...
@@ -31,7 +31,7 @@ jobs:
     #     go-package: ./...
 
     - name: Test
-      run: go test -v -coverprofile=coverage.txt -covermode=atomic -race ./...
+      run: go test -v -coverprofile=coverage.txt -covermode=atomic -coverpkg=./... -race ./...
     
     - name: Upload coverage reports to Codecov
       uses: codecov/codecov-action@v5