Chore: carryforward coverage with new split ci (#11739)

.codecov.yml

@@ -9,6 +9,15 @@ component_management:
     - component_id: frontend
       paths:
         - src-ui/**
+flags:
+  backend:
+    paths:
+      - src/**
+    carryforward: true
+  frontend:
+    paths:
+      - src-ui/**
+    carryforward: true
 # https://docs.codecov.com/docs/pull-request-comments
 comment:
   layout: "header, diff, components, flags, files"

.github/workflows/ci-backend.yml

@@ -88,13 +88,13 @@ jobs:
         if: always()
         uses: codecov/codecov-action@v5
         with:
-          flags: backend-python-${{ matrix.python-version }}
+          flags: backend,backend-python-${{ matrix.python-version }}
           files: junit.xml
           report_type: test_results
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
         with:
-          flags: backend-python-${{ matrix.python-version }}
+          flags: backend,backend-python-${{ matrix.python-version }}
           files: coverage.xml
           report_type: coverage
       - name: Stop containers

.github/workflows/ci-frontend.yml

@@ -109,13 +109,13 @@ jobs:
         if: always()
         uses: codecov/codecov-action@v5
         with:
-          flags: frontend-node-${{ matrix.node-version }}
+          flags: frontend,frontend-node-${{ matrix.node-version }}
           directory: src-ui/
           report_type: test_results
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
         with:
-          flags: frontend-node-${{ matrix.node-version }}
+          flags: frontend,frontend-node-${{ matrix.node-version }}
           directory: src-ui/coverage/
   e2e-tests:
     name: "E2E Tests (${{ matrix.shard-index }}/${{ matrix.shard-count }})"