feat: add codecov integration with test results upload

- Add lcov reporter to nyc configuration for codecov compatibility
- Add codecov upload steps to CI workflow for coverage and test results
- Configure fail_ci_if_error: false to not block CI on codecov issues

Project already has .github/codecov.yml with project and patch coverage checks configured.

Author: devin-ai-integration[bot]

.github/workflows/ci.yml

@@ -92,6 +92,20 @@ jobs:
       - name: Run tests
         run: npm test
 
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: coverage/lcov.info
+          fail_ci_if_error: false
+
+      - name: Upload test results to Codecov
+        if: '!cancelled()'
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: test-report.xml
+
       - name: Check dependencies
         run: npm run checkDependencies
         continue-on-error: true

src/test/coverage.node.ts

@@ -14,7 +14,7 @@ export function setupCoverage() {
         return;
     }
     const htmlReport = process.env.VSC_JUPYTER_INSTRUMENT_CODE_FOR_COVERAGE_HTML ? ['html'] : [];
-    const reports = htmlReport.concat(['text', 'text-summary']);
+    const reports = htmlReport.concat(['text', 'text-summary', 'lcov']);
     const NYC = require('nyc');
     const nyc = new NYC({
         cwd: path.join(EXTENSION_ROOT_DIR_FOR_TESTS),