chore(licence): normalise to MPL-2.0 + CC-BY-SA-4.0 (canonical pair) (#58)

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): 18. Manual-review licence PR.

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

Author: hyperpolymath

.githooks/commit-msg

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SPDX-FileCopyrightText: 2024 Joshua Jewell
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 #
 # RSR Commit-msg Hook
 # Validates commit message format

.githooks/pre-commit

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SPDX-FileCopyrightText: 2024 Joshua Jewell
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 #
 # RSR Pre-commit Hook
 # Runs validation before commits

.githooks/prepare-commit-msg

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SPDX-FileCopyrightText: 2024 Joshua Jewell
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 #
 # RSR Prepare-commit-msg Hook
 # Adds DCO sign-off to commit messages

.github/workflows/governance.yml

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 name: Governance
 
 on:

.github/workflows/hypatia-scan.yml

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 name: Hypatia Security Scan
 
 on:

.github/workflows/scorecard.yml

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 name: OSSF Scorecard
 
 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

ACCOUNTABILITY.adoc

@@ -1,5 +1,5 @@
 // SPDX-FileCopyrightText: 2024 Joshua Jewell
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 = Mutually Assured Accountability (MAA) Framework
 :toc:
 :toclevels: 3

CHANGELOG.adoc

@@ -1,5 +1,5 @@
 <!-- SPDX-FileCopyrightText: 2024 Joshua Jewell -->
-<!-- SPDX-License-Identifier: MIT -->
+<!-- SPDX-License-Identifier: CC-BY-SA-4.0 -->
 
 = Changelog