Add CSV Export for Grant Data

[Abd-Standard]

Description:
Allow authorized users or administrators to export grant records for analysis or reporting.

Acceptance Criteria:

Data can be exported in CSV format.
Exported fields are clearly defined.
Sensitive or restricted information is excluded.

[s6pa1rta3n-lab]

/try

I am picking up this issue to implement the CSV export functionality for grant/task data with strict field sanitization, CSV formula injection protection, sensitive data filtering, and comprehensive test coverage.

[N-thnI]

Dear maintainer please assign me this issue

[grantfox-oss]

🦊 GrantFox — @N-thnI has been assigned to this issue as part of the Third Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #161)
2. Your PR will be reviewed by the Core-Foundry maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@N-thnI's PR #178 was approved and merged by @Abd-Standard.

🏆 @N-thnI: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,494 total points). Track your full progress on GrantFox.

👏 Great work, @N-thnI! Keep contributing to Core-Foundry.