feat: stub extraction of finances to dedicated app (Nest+PWA+MCP+DB) modeled on prospector
- Full skeleton: backend modules (financials per LP contract + shape), auth/health, web PWA tabs (dashboard/income/etc), mcp stub, migrations, docs (FINANCES.md + detailed MIGRATION_FROM_LP.md), CLAUDE, STANDARDS, run/scripts.
- Design embodied: scope from lp.live entities/financials + surfaces/my/financials* + my/backend schema + frontend Financials* pages/tabs + docs/quinn-my/financials.md
- Follows prospector extraction precedent exactly for future cutover/proxies from lp.live
- Verified: structure ls, partial tsc (dep errors only), files read
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