Update test workflow to include demo-v4 branch and ensure consistent path definitions

Author: Kingshuk-Microsoft

.github/workflows/test.yml

@@ -4,8 +4,18 @@ on:
   push:
     branches:
       - main
+      - demo-v4
       - dev-v4
       - macae-v4-unittestcases-kd
+    paths:
+      - 'src/backend/**/*.py'
+      - 'src/tests/**/*.py'
+      - 'src/mcp_server/**/*.py'
+      - 'src/**/pyproject.toml'
+      - 'pytest.ini'
+      - 'conftest.py'
+      - 'src/backend/requirements.txt'
+      - '.github/workflows/test.yml'
   pull_request:
     types:
       - opened
@@ -14,8 +24,17 @@ on:
       - synchronize
     branches:
       - main
+      - demo-v4
       - dev-v4
-      - macae-v4-unittestcases-kd
+    paths:
+      - 'src/backend/**/*.py'
+      - 'src/tests/**/*.py'
+      - 'src/mcp_server/**/*.py'
+      - 'pytest.ini'
+      - 'conftest.py'
+      - 'src/backend/requirements.txt'
+      - 'src/**/pyproject.toml'
+      - '.github/workflows/test.yml'
 
 jobs:
   test: