fix(licence): #3 Tranche 1 — clear scaffold-placeholder leak (project-wharf) (#28)

#3 Tranche 1 (post-pilot #32-shape). Scaffold-placeholder leak per
`standards/LICENCE-POLICY.adoc` **A5** — NOT relicensing. PLMP/PMLP +
doubled-suffix substituted to this repo's correct id
`PMPL-1.0-or-later`. **2 file(s).** Gates: diff-shape asserted
(SPDX-only, auto-revert on anomaly), zero residual, no 3c file. 🤖
Generated with [Claude Code](https://claude.com/claude-code)

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