chore(licence): normalise to MPL-2.0 + CC-BY-SA-4.0 (canonical pair) (#63)

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): 15. Manual-review licence PR.

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

Author: hyperpolymath

.githooks/pre-commit

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 # SPDX-FileCopyrightText: 2025 Jonathan D. A. Jewell <hyperpolymath>
 #
 # Pre-commit hook for Project Wharf

.githooks/pre-push

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 # SPDX-FileCopyrightText: 2025 Jonathan D. A. Jewell <hyperpolymath>
 #
 # Pre-push hook for Project Wharf

.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 — Project Wharf
 :toc: left
 :icons: font

.well-known/ai.txt

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 # SPDX-FileCopyrightText: 2025 Jonathan D. A. Jewell <hyperpolymath>
 #
 # AI Crawling Policy

.well-known/consent-required.txt

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 # SPDX-FileCopyrightText: 2025 Jonathan D. A. Jewell <hyperpolymath>
 #
 # Consent Required Protocol (HTTP 430)

.well-known/security.txt

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: MIT
+# SPDX-License-Identifier: MPL-2.0
 # SPDX-FileCopyrightText: 2025 Jonathan D. A. Jewell <hyperpolymath>
 #
 # Security Policy (RFC 9116)

CHANGELOG.adoc

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 = Changelog
 
 All notable changes to Project Wharf will be documented in this file.

CHANGELOG.md

@@ -1,5 +1,5 @@
 <!--
-SPDX-License-Identifier: MPL-2.0
+SPDX-License-Identifier: CC-BY-SA-4.0
 SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell (hyperpolymath)
 -->
 

CITATION.cff

@@ -1,6 +1,6 @@
 # CITATION.cff - Citation File Format for wharf
 # https://citation-file-format.github.io/
-# SPDX-License-Identifier: AGPL-3.0-or-later OR LicenseRef-Palimpsest-0.5
+# SPDX-License-Identifier: MPL-2.0 OR LicenseRef-Palimpsest-0.5
 
 cff-version: 1.2.0
 title: "wharf"

CONTRIBUTING.adoc

@@ -166,7 +166,7 @@ All source files must include SPDX headers:
 
 [source,rust]
 ----
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: CC-BY-SA-4.0
 // SPDX-FileCopyrightText: 2025 Your Name <email>
 ----