fix: enforce secure flags on antiforgery and auth-related cookies

[mahmoodcli]

Description

This change addresses the ITHC finding in section 5.1.6 relating to missing secure cookie flags.

Related Trello Ticket

https://trello.com/c/LDmvKkSK

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Manual testing performed

Checklist

• 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
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have verified accessibility requirements are met

Screenshots (if applicable)

[github-actions]

Code Coverage Report: Only Changed Files listed

Package	Coverage
Overall Coverage	🟢 77.52%

Minimum allowed coverage is 0%, this run produced 77.52%