What this PR does / why we need it :

Close: #445

Brief change log

• charts/deps/Chart.yaml: Upgraded Airflow dependency to 1.19.0.
• Removed webserverSecretKey (previously used for the webserver).
• Added fernetKey to allow API components to reuse sessions via Fernet encryption.
• Added apiSecretKey for the API server.
• Added jwtSecret to support JWT authentication.
• Removed the webserver configuration, as the new version uses createUserJob for user creation.
• Added and reorganized component configurations, aligning them with the Airflow values structure to improve usability for end users.

Type of change :

• Bug fix
• Improvement
• New feature
• Documentation

Checklist:

• I have read the CONTRIBUTING document.
• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• All new and existing tests passed.

Reviewers