fix(licence): clear scaffold-placeholder leak (Tranche 1) (#16)

#3 Tranche 1. PLMP/PMLP-1.0-or-later sentinel + PMPL-1.0-or-later-or-later
are scaffold-substituter artifacts (LICENCE-POLICY.adoc A5), NOT
relicensing. Substituted to this repo's correct id PMPL-1.0-or-later.
Diff = SPDX identifier lines ONLY (diff-shape asserted; auto-revert on
any anomaly). No 3c-sensitive file touched.
Refs hyperpolymath/standards LICENCE-POLICY.adoc A5.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.machine_readable/contractiles/trust/Trustfile.a2ml

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMLP-1.0-or-later
+# SPDX-License-Identifier: PMPL-1.0-or-later
 # =============================================================================
 # A2ML Trustfile Template (Cyber-Resilient Baseline)
 # Replace all {{PLACEHOLDERS}} for each derived repository.