test: cover lease PDF normalize, open-ended overlap, payroll parse

[cursor]

Risky behavior now covered

• Native VA lease PDF defaults / zero-rent coalescing and unsafe filename sanitization (normalizeLeaseData, safeFilePart, formatDate)
• Open-ended leases (end_date null/empty) counting toward house-cover active-tenant math
• Boots-on-site "other work" amount parse ($0.50 floor, $/comma strip, cent rounding) + Cash App pay labels
• Norfolk TZ visit month keys near UTC month boundaries + leftover status edges
• Monthly rent invoice currentMonthStart / currentMonthEnd (leap/short months, TZ=UTC)

Test files added/updated

• scripts/test-native-lease-pdf-normalize.js
• scripts/test-native-lease-doc-helpers.js (+ pure extract src/services/native-lease-doc-helpers.js)
• scripts/test-leases-overlap-open-ended.js
• scripts/test-site-visit-other-work-parse.js
• scripts/test-site-visit-month-keys.js
• scripts/test-rent-billing-month-bounds.js
• package.json scripts for the above

Why this reduces regression risk

These paths sit under lease PDFs, utility house-cover splits, associate payroll CTAs, visit month grouping, and rent invoicing — high blast radius if defaults, open-ended dates, money parse, or calendar bounds drift. Suites are deterministic (no DB/Stripe) and unique vs open coverage drafts #30–#77.

Validation

npm run test:native-lease-pdf-normalize
npm run test:native-lease-doc-helpers
npm run test:leases-overlap-open-ended
npm run test:site-visit-other-work-parse
npm run test:site-visit-month-keys
npm run test:rent-billing-month-bounds

All passed locally.