chore(licence): normalise to MPL-2.0 + CC-BY-SA-4.0 (canonical pair) (#37)

Estate licence normalisation. LICENSES/={MPL-2.0,CC-BY-SA-4.0}; root
LICENSE=verbatim MPL-2.0 (GitHub display); code->MPL-2.0,
docs(.md/.adoc)->CC-BY-SA-4.0; vendored untouched. Residual mentions
(mostly legitimate anti-AGPL rules): 31. Manual-review licence PR.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.claude/CLAUDE.md

@@ -1,5 +1,5 @@
 <!--
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0
 Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 -->
 # Formatrix Docs - Claude Code Instructions

.github/workflows/casket-pages.yml

@@ -1,5 +1,5 @@
 # // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
-# SPDX-License-Identifier: MPL-2.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 name: GitHub Pages
 on:
   push:

.github/workflows/scorecard.yml

@@ -1,5 +1,5 @@
 # // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
-# SPDX-License-Identifier: PMPL-1.0
+# SPDX-License-Identifier: MPL-2.0
 name: Scorecards supply-chain security
 
 on:

.github/workflows/secret-scanner.yml

@@ -1,5 +1,5 @@
 # // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
-# SPDX-License-Identifier: PMPL-1.0
+# SPDX-License-Identifier: MPL-2.0
 name: Secret Scanner
 on:
   pull_request:

.machine_readable/6a2/README.adoc

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 # A2ML 6a2 Directory
 

.machine_readable/6a2/anchor/README.adoc

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 # A2ML Anchor Directory
 

.machine_readable/bot_directives/README.adoc

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 = Agent Instructions
 :toc: preamble

.machine_readable/contractiles/Justfile

@@ -530,7 +530,7 @@ tour:
     echo "  Docmatrix — Guided Tour"
     echo "═══════════════════════════════════════════════════"
     echo ""
-    echo '// SPDX-License-Identifier: MPL-2.0-or-later'
+    echo '// SPDX-License-Identifier: MPL-2.0'
     echo ""
     echo "Key directories:"
     echo "  src/                      Source code" 

ABI-FFI-README.md

@@ -1,5 +1,5 @@
 <!--
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0
 Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 -->
 {{~ Aditionally delete this line and fill out the template below ~}}

CHANGELOG.md

@@ -1,6 +1,6 @@
 <!--
 <!-- Owner: Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk> -->
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0
 SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell (hyperpolymath)
 -->