EduVault issue reward labels are not mapped to contributor difficulty and review path

[prissca]

Problem

GrantFox contributors need labels and docs that clarify issue difficulty, expected reviewer, reward eligibility, and required verification before claiming work.

Scope

• Define label taxonomy for reward issues
• Map labels to review requirements
• Document claim and completion workflow

Acceptance criteria

• Reward-eligible issues have clear labels and review expectations
• Contributors know which proof is required for completion
• Docs explain maintainer triage rules

Relevant areas

• .github/labels.yml
• .github/ISSUE_TEMPLATE
• CONTRIBUTING.md

Complexity

High - 200 points

Contributor guidance

Start with a short design note in the issue discussion, then implement with focused tests and documentation for the affected workflow.