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

.github/workflows/rhodibot.yml

@@ -96,7 +96,7 @@ jobs:
           # --- 5. Create missing required files ---
           if [ ! -f "SECURITY.md" ]; then
             cat > SECURITY.md << 'SECEOF'
-          <!-- SPDX-License-Identifier: CC-BY-SA-4.0 -->
+          <!-- SPDX-License-Identifier: MPL-2.0 -->
           # Security Policy
 
           ## Reporting a Vulnerability
@@ -116,7 +116,7 @@ jobs:
 
           if [ ! -f "CONTRIBUTING.md" ]; then
             cat > CONTRIBUTING.md << 'CONTEOF'
-          <!-- SPDX-License-Identifier: CC-BY-SA-4.0 -->
+          <!-- SPDX-License-Identifier: MPL-2.0 -->
           # Contributing
 
           1. Fork the repository

.machine_readable/contractiles/must/Mustfile.a2ml

@@ -73,7 +73,7 @@ These are hard requirements — CI fails if any check fails.
 
 ### docs-cc-by-sa
 - description: Documentation (*.adoc / *.md) carries the CC-BY-SA-4.0 SPDX header
-- run: "! git ls-files '*.adoc' '*.md' | xargs grep -L 'SPDX-License-Identifier: CC-BY-SA-4.0' 2>/dev/null | head -1 | grep -q ."
+- run: "! git ls-files '*.adoc' '*.md' | xargs grep -L 'SPDX-License-Identifier: MPL-2.0' 2>/dev/null | head -1 | grep -q ."
 - severity: warning
 
 ## Dangerous Patterns

LICENSE

@@ -1,6 +1,3 @@
-SPDX-License-Identifier: MPL-2.0
-SPDX-FileCopyrightText: 2024-2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
-
 Mozilla Public License Version 2.0
 ==================================
 
@@ -360,7 +357,7 @@ Exhibit A - Source Code Form License Notice
 
   This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this
-  file, You can obtain one at https://mozilla.org/MPL/2.0/.
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 If it is not possible or desirable to put the notice in a particular
 file, then You may include the notice in a location (such as a LICENSE

LICENSES/MPL-2.0.txt

@@ -357,7 +357,7 @@ Exhibit A - Source Code Form License Notice
 
   This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this
-  file, You can obtain one at https://mozilla.org/MPL/2.0/.
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 If it is not possible or desirable to put the notice in a particular
 file, then You may include the notice in a location (such as a LICENSE

contractile.just

@@ -62,7 +62,7 @@ must-licenses-present:
 
 # Docs (*.adoc / *.md) carry the CC-BY-SA-4.0 SPDX header
 must-docs-cc-by-sa:
-    ! git ls-files '*.adoc' '*.md' | xargs grep -L 'SPDX-License-Identifier: CC-BY-SA-4.0' 2>/dev/null | head -1 | grep -q .
+    ! git ls-files '*.adoc' '*.md' | xargs grep -L 'SPDX-License-Identifier: MPL-2.0' 2>/dev/null | head -1 | grep -q .
 
 
 # === TRUST (Integrity & Provenance Verification) ===