docs: add OpenSSF Best Practices registration badge

Author: hyperpolymath

README.adoc

@@ -1,10 +1,13 @@
-image:https://img.shields.io/badge/License-PMPL--1.0-blue.svg[License: PMPL-1.0,link="https://github.com/hyperpolymath/palimpsest-license"]
+// SPDX-License-Identifier: MPL-2.0
+// Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
+image:https://img.shields.io/badge/License-MPL_2.0-blue.svg[License: MPL-2.0,link="https://opensource.org/licenses/MPL-2.0"]
 image:https://img.shields.io/badge/Philosophy-Palimpsest-indigo.svg[Palimpsest,link="https://github.com/hyperpolymath/palimpsest-license"]
 
-// SPDX-License-Identifier: MPL-2.0
 // SPDX-FileCopyrightText: 2024-2025 The polysafe-gitfixer Contributors
 
 = polysafe-gitfixer
+image:https://img.shields.io/badge/OpenSSF-Best_Practices-green?logo=openssourcesecurity[OpenSSF Best Practices,link="https://www.bestpractices.dev/en/projects/new?repo_url=https://github.com/hyperpolymath/polysafe-gitfixer"]
+
 :toc:
 :toc-placement!:
 :sectnums:
@@ -193,12 +196,9 @@ We welcome contributions! See link:CONTRIBUTING.adoc[CONTRIBUTING] for:
 
 == License
 
-This project is dual-licensed under:
-
-* **Palimpsest-MPL-1.0 License** - Permissive, widely compatible
-* **Palimpsest License v0.8** - Collaborative attribution, AI training restrictions
+This project is licensed under the Mozilla Public License, v. 2.0. See the `LICENSE` file for details.
 
-See link:LICENSE.txt[LICENSE.txt] for full terms.
+SPDX-License-Identifier: MPL-2.0
 
 == Acknowledgments