Fix acceptance stage deployment and testing issues

Critical fixes for deployment action and system-test configuration:

1. Fixed deploy-docker-images action: changed 'pytest src/test/python/' to 'pytest .'
2. Fixed system-test/pyproject.toml: changed testpaths from 'src/test/python' to '.'
3. Fixed system-test dependency: downgraded httpx from 0.28.1 to 0.27.2 for pytest-httpx compatibility

These were the root causes of acceptance stage failures:
- Deploy action couldn't find tests due to old path
- pytest configuration pointed to non-existent directory
- Same httpx version conflict as in monolith

Author: valentinajemuovic

.github/actions/deploy-docker-images/action.yml

@@ -67,7 +67,7 @@ runs:
       working-directory: system-test
 
     - name: Run Smoke Tests
-      run: pytest src/test/python/ -m smoke -v
+      run: pytest . -m smoke -v
       shell: bash
       working-directory: system-test
 

system-test/pyproject.toml

@@ -1,5 +1,5 @@
 [tool.pytest.ini_options]
-testpaths = ["src/test/python"]
+testpaths = ["."]
 python_files = ["test_*.py", "*_test.py"]
 python_classes = ["Test*"]
 python_functions = ["test_*"]

system-test/requirements.txt

@@ -1,4 +1,4 @@
-httpx==0.28.1
+httpx==0.27.2
 pytest==8.3.4
 pytest-asyncio==0.24.0
 pytest-httpx==0.32.0