[EWT-371] Add payment_source property to authorized and failed payment details

[tl-luca-baggi]

Description

Add payment_source property to Authorized and Failed payment details as per Get Payment reference docs

Type of change

Please select multiple options if required.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code where necessary
• I have added tests that prove my fix is effective or that my feature works
• I have updated the relevant documentation

[swarmia]

✅  Linked to Task EWT-371 · [Java lib] Add payment_source field to missing get payment responses