chore(ci): replace scorecard.yml with reusable wrapper (#21)

Pins to hyperpolymath/standards#205 merge SHA e0caf11508a3989574713c78f5f444f2ce5e33ef. Replaces the
canonical scorecard.yml with a thin wrapper. Closes the 5-candidate
convergence set (mirror, secret-scanner, codeql, hypatia-scan, scorecard).

Part of estate-wide convergence campaign 2026-05-26
(standards#199 / #205).

Author: hyperpolymath