test(spec): the currency-mode family's enumerating closure pin

One test in spec's repo project walks the family's corpus and holds two
text rules at zero: every `defaultCurrency` unit in the published skills
and docs carries the `fixed` condition, and the date record is never named
within five lines of currency text. The spec package's declared radius
gains each example app's `src/**/*.ts`, which rule B reads.

Claude-Session: https://claude.ai/code/session_01ARcDurZ5j34RdqsGgc4jgH
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude