Enhance test cases in custom_test_case.py with detailed docstrings fo… (

#585)

* Enhance test cases in custom_test_case.py with detailed docstrings for better clarity and maintainability. Added comprehensive descriptions for methods related to user authentication, API interactions, and database operations. Improved structure and documentation of test classes for better organization and understanding of test functionalities.

* Update GitHub Actions workflow to support Python 3.12 and upgrade action versions

* Enhance unit tests across multiple modules with detailed docstrings for improved clarity and maintainability. Updated test descriptions for actions, alarms, API views, cases, CLI commands, DAGs, and data checks to include functionality, expected outcomes, and validation criteria. This refactoring aims to provide better organization and understanding of test functionalities, ensuring comprehensive coverage of various scenarios.

* Small typos

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Co-authored-by: AlejandraGalan <[email protected]>

.github/workflows/test_cornflow_server.yml

@@ -48,9 +48,9 @@ jobs:
           - 5432:5432
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Copy DAG files