Added config file for the Ruff Python linter and fixed additional errors - Unit Tests

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I started working from Added config file for the Ruff Python linter and fixed additional errors.

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🔄 1 test file added.
🐛 Found 2 bugs

🔄 Test Updates

I've added 1 tests. They all pass ☑️
New Tests:

• tests/test_migrate.py

No existing tests required updates.

🐛 Bug Detection

Potential issues:

• management/dns_update.py
  The error is caused by a syntax error in the source code file /app/temp_workspace/management/dns_update.py on line 462. The specific error is an unterminated string literal, which means that a string was started but not properly closed.
  The problematic line is:

yield f"{algorithm_number[keytype]:d} {2 # specifies we are using SHA-256 on next line

This line has a few issues:

1. The f-string is not properly terminated. It's missing a closing curly brace } after 2.
2. There's an inline comment within the f-string, which is not allowed.
3. The string is not closed with a quotation mark.
   To fix this, the line should be rewritten to properly close the f-string and move the comment outside of it. For example:

yield f"{algorithm_number[keytype]:d} {2}"  # specifies we are using SHA-256 on next line

This error is preventing the tests from running because the Python interpreter cannot parse the file due to the syntax error. It's not an issue with the test itself, but with the code being tested.

• management/ssl_certificates.py
  The error we're seeing is an ImportError, specifically a ModuleNotFoundError. The issue is occurring when trying to import the utils module in the ssl_certificates.py file. This suggests that the utils module is not in the Python path or doesn't exist in the expected location.
  This error is preventing the tests from even being collected, as the import failure happens during the module import phase, before any tests can be run.
  The problem is likely due to how the project is structured or how Python is finding (or not finding) the modules. This is a common issue when dealing with imports in Python projects, especially when the directory structure or Python path isn't set up as expected.
  Given that this is occurring in the management/ssl_certificates.py file, which is trying to import from utils, we can infer that utils is probably supposed to be a sibling module to ssl_certificates within the management package, or it's supposed to be a top-level module in the project.
  To fix this, we would need to ensure that the utils module is in the correct location and that Python can find it. This might involve:

1. Checking if the utils.py file exists in the expected location.
2. Ensuring that the directory containing utils.py is in the Python path.
3. Possibly modifying the import statement to use a relative import if utils is part of the same package.
   However, since we can't modify the source code in this context, the best we can do is to identify that this is an issue with the project structure or environment setup, rather than with the tests themselves.

☂️ Coverage Improvements

Coverage improvements by file:

• tests/test_migrate.py

  New coverage: 90.24%
  Improvement: +90.24%

🎨 Final Touches

• I ran the hooks included in the pre-commit config.

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