Add integration tests for config sensitive masking in airflowctl

[Subham-KRLX]

Description

Added integration tests to verify sensitive config values are properly masked end-to-end when using airflowctl with actual Airflow API.

The Airflow API masks sensitive values (like fernet_key, sql_alchemy_conn) as < hidden >. These integration tests confirm that airflowctl correctly preserves and displays those masked values in real scenarios.

Changes

• Added test_config_sensitive_masking.py to airflow-ctl-tests
• 3 integration test cases covering:
  • config list command
  • config get for fernet_key
  • config get for sql_alchemy_conn
• Tests run against actual docker-compose Airflow environment
• Verifies < hidden > appears in output for sensitive configs

Related PRs

• Relates to Add test for sensitive config masking in airflowctl #60361 (unit tests for config masking)

Related Issue

Closes #59843

Testing

# Run from airflow-ctl-tests directory
pytest tests/airflowctl_tests/test_config_sensitive_masking.py -v

[potiuk]

Some static checks fail

[Subham-KRLX]

@potiuk Thanks for pointing that out. I have fixed the static check failures (import sorting) and verified everything locally with pre-commit. The changes are pushed and CI should pass now.