feat: add ValidationHistory filters and pagination

[go165]

Summary

• add status filtering, vault/owner search, and client-side pagination to ValidationHistory
• extract reusable filter/pagination logic into src/utils/paginate.ts
• add accessible filter/page controls, empty-state handling, focused tests, and design-system docs

Closes #129

Verification

• /home/ubuntu/Disciplr-Frontend/node_modules/.bin/vitest run --coverage --run src/utils/__tests__/paginate.test.ts src/pages/__tests__/ValidationHistory.test.tsx
• git diff --check

Payout

If this issue is reward eligible, payout wallet: 0x1f0130669ca6fd02e025a984cc038f139df19a2f