fix: SPDX headers (AGPL→PMPL), email, author name

- AGPL-3.0-or-later → PMPL-1.0-or-later in SPDX-License-Identifier lines
- jonathan.jewell@open.ac.uk → j.d.a.jewell@open.ac.uk
- "hyperpolymath" → "Jonathan D.A. Jewell" in author fields

Part of global TODO cleanup (2026-03-16).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

README.adoc

@@ -6,7 +6,7 @@ image:https://img.shields.io/badge/RSR-Certified-gold[RSR Certified]
 image:https://img.shields.io/badge/Idris-inside-purple[Idris Inside]
 image:https://img.shields.io/badge/Status-Production%20Ready-green[Production Ready]
 
-Jonathan D.A. Jewell <jonathan.jewell@open.ac.uk>
+Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 v1.0.0, 2026-02-07
 :toc: macro
 :icons: font

docs/AI_INSTALLATION_GUIDE.adoc

@@ -428,6 +428,6 @@ AI: You're all set! Here are some examples:
 
 == License
 
-Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <jonathan.jewell@open.ac.uk>
+Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
 
 SPDX-License-Identifier: PMPL-1.0-or-later