cleanup to eradicate jest fully

.github/workflows/pull-request.yml

@@ -250,28 +250,13 @@ jobs:
           NODE_V8_COVERAGE: './coverage/vitest'
         run: |
           npm run test:vitest:coverage
-
-      - name: Upload Vitest Coverage to Codecov
-        if: steps.changed-files.outputs.any_changed == 'true'
-        uses: codecov/codecov-action@v4
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          files: ./coverage/vitest/lcov.info
-          flags: vitest
-          fail_ci_if_error: true
-
-      - name: Merge Jest and Vitest Coverage Reports
-        run: |
-          mkdir -p ./coverage
-          npx lcov-result-merger './coverage/*/lcov.info' './coverage/lcov.info'
   
-      - name: Upload Combined Coverage to Codecov
+      - name: Upload Coverage to Codecov
         uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           gcov_ignore: 'docs/'
-          files: ./coverage/lcov.info
-          flags: combined
+          files: ./coverage/vitest/lcov.info
           fail_ci_if_error: true
 
       - name: TypeScript compilation for changed files