fix(licence): clear scaffold-placeholder leak (Tranche 2)

#3 Tranche 2. 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; dirty repos skipped). 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

contractiles/dust/Dustfile

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PLMP-1.0-or-later
+# SPDX-License-Identifier: PMPL-1.0-or-later
 # Dustfile template - recovery and rollback semantics
 
 version: 1

contractiles/must/Mustfile

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PLMP-1.0-or-later
+# SPDX-License-Identifier: PMPL-1.0-or-later
 # Mustfile - declarative state contract (template)
 # See: https://github.com/hyperpolymath/mustfile
 

contractiles/trust/Trustfile.hs

@@ -1,4 +1,4 @@
--- SPDX-License-Identifier: PLMP-1.0-or-later
+-- SPDX-License-Identifier: PMPL-1.0-or-later
 -- Trustfile template - cryptographic and provenance verification
 
 module Trustfile where