chore(licence): normalise to MPL-2.0 + CC-BY-SA-4.0 (canonical pair) (#26)

Estate licence normalisation (batch). LICENSES/={MPL-2.0,CC-BY-SA-4.0};
root LICENSE=MPL-2.0 (GitHub display); code->MPL-2.0,
docs(.md/.adoc)->CC-BY-SA-4.0; metadata/badge contradictions fixed;
vendored/upstream paths untouched. Residual contradiction lines after
fix: 17. Manual-review licence PR.

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

Author: hyperpolymath

.github/workflows/codeql.yml

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0
+# SPDX-License-Identifier: MPL-2.0
 name: CodeQL Security Analysis
 
 on:

.github/workflows/scorecard.yml

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0
+# SPDX-License-Identifier: MPL-2.0
 name: Scorecards supply-chain security
 
 on:

.github/workflows/secret-scanner.yml

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0
+# SPDX-License-Identifier: MPL-2.0
 name: Secret Scanner
 
 on:

.machine_readable/agent_instructions/README.adoc

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 // Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
 = Agent Instructions
 :toc: preamble

.machine_readable/svc/k9/README.adoc

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 = K9 Contractiles
 :toc: left
 :icons: font

ARCHITECTURE.adoc

@@ -1380,4 +1380,4 @@ $ jgd-sql compile -i test.sql
 
 This document is licensed under the Palimpsest Meta-Philosophical License (MPL-2.0).
 
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0

ARXIV-PAPER-DISCUSSION.adoc

@@ -272,4 +272,4 @@ Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 This document is licensed under the Palimpsest Meta-Philosophical License (MPL-2.0).
 
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0

ARXIV-POSITION-PAPER.adoc

@@ -894,4 +894,4 @@ This work builds on foundational insights from Alfred Korzybski (map/territory),
 
 This document is licensed under the Palimpsest Meta-Philosophical License (MPL-2.0).
 
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0

ARXIV-RELATED-WORK.adoc

@@ -148,4 +148,4 @@ The novelty is not the concepts—it's their **formalization and systematic appl
 
 This document is licensed under the Palimpsest Meta-Philosophical License (MPL-2.0).
 
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0

BACKENDS.adoc

@@ -521,4 +521,4 @@ The grammar works everywhere. The journey works best with verisim.
 
 This document is licensed under the Palimpsest Meta-Philosophical License (MPL-2.0).
 
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0