Cap structured revenue shares at 100%

[zaguzovmaksim0-hue]

What changed

• enforce the same 100% ceiling for structured revenue_share pay objects that the text parser already enforces
• add regression coverage for a 150% single value, a 50–150% range, and a valid 10–25% range

Reproduction

Before this fix:

parsePayLine('150% revenue share')
=> "A revenue share is at most 100%."

normalisePay({ pay: [{ type: 'revenue_share', amount: 150 }] })
=> accepted as 150%

That allowed REST/MCP/CLI structured callers to persist a shape rejected by the human-readable parser.

Tests

• node --test test/pay.test.ts — 11/11 pass
• pnpm test — pass on Android/Termux; the database-dependent API suite skips when local Postgres is unavailable, as designed

Closes #72