feat: add LP earnings history export

[newmattock]

Fixes #30

Summary

• add an Earnings History section to the LP portfolio view
• show paid LP positions with invoice ID, payer, settlement date, amount funded, payout received, earned amount, token, and yield percent
• sort earnings rows newest first and paginate 20 rows per page
• export all earnings rows, not just the visible page, as ILN-LP-Earnings-[date].csv
• add LP earnings row/CSV/filename tests

Notes

• This frontend does not currently expose a separate InvoicePaid event-history API. The table is derived from the LP portfolio invoice list and includes invoices with Paid status, using funded_at when present and due_date as the fallback settlement timestamp.
• Also includes a small build fix for the newly-required governance Vetoed status config on current main, plus the Vitest @ alias fix used by focused tests.

Validation

• npm test -- src/utils/tests/lpEarnings.test.ts --reporter verbose
• npx eslint src/utils/lpEarnings.ts src/utils/tests/lpEarnings.test.ts src/components/LPEarningsTable.tsx src/components/LPPortfolio.tsx vitest.config.ts
• npm run build
• git diff --check
• local smoke: HEAD /lp returned HTTP 200 on port 3017