Refactor test workflow to improve coverage reporting and streamline app.py test execution

Author: Kingshuk-Microsoft

.github/workflows/test.yml

@@ -53,12 +53,17 @@ jobs:
       - name: Run app.py tests separately (requires isolation due to mocking)
         if: env.skip_tests == 'false'
         run: |
-          python -m pytest src/tests/backend/test_app.py --cov=backend.app --cov-report=term --cov-config=.coveragerc
+          python -m pytest src/tests/backend/test_app.py --cov=backend.app --cov-report= --cov-config=.coveragerc
 
-      - name: Run tests with coverage
+      - name: Run all other backend tests with coverage
         if: env.skip_tests == 'false'
         run: |
-          python -m pytest src/tests/backend --cov=backend --cov-report=term --cov-config=.coveragerc --ignore=src/tests/backend/test_app.py
+          python -m pytest src/tests/backend --cov=backend --cov-append --cov-report= --cov-config=.coveragerc --ignore=src/tests/backend/test_app.py
+      
+      - name: Generate combined coverage report
+        if: env.skip_tests == 'false'
+        run: |
+          python -m coverage report --rcfile=.coveragerc
 
       # - name: Run tests with coverage
       #   if: env.skip_tests == 'false'