feat: v2

[scott-dn]

Why?

• v2

How?

• Manual reply
• Rust safe
• Improve internal data structure
• Cap failover
• Integration test

Tickets?

• N/A

Contribution checklist?

• The commit messages are detailed
• It does not break existing features (unless required)
• I have performed a self-review of my own code
• Documentation has been updated to reflect the changes
• Tests have been added or updated to reflect the changes
• All code formatting pass
• All lints pass
• All tests pass

Security checklist?

• Injection has been prevented (parameterized queries, no eval or system calls)
• Sensitive data has been identified and is being protected properly

Demo?

Optionally, provide any screenshot, gif or small video.