chore: scrub personal gmail from docs/configs (estate-wide sweep)

Replaced jonathan.jewell@gmail.com with j.d.a.jewell@open.ac.uk per
the hyperpolymath author-attribution rule (the gmail is banned;
j.d.a.jewell@open.ac.uk is the canonical non-Git-context address).

PLACEHOLDERS files got a generic user-old@example.com so they remain
useful as templates.

.mailmap files in this repo (if any) are intentionally left — they
are the legitimate git mechanism for remapping historical commits
authored under the old gmail to the correct open.ac.uk address.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

README.adoc

@@ -4,7 +4,7 @@ image:https://img.shields.io/badge/License-PMPL--1.0-blue.svg[License: PMPL-1.0,
 image:https://img.shields.io/badge/Philosophy-Palimpsest-indigo.svg[Palimpsest,link="https://github.com/hyperpolymath/palimpsest-license"]
 
 
-Jonathan D.A. Jewell <jonathan.jewell@gmail.com>
+Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 :toc: macro
 :icons: font
 :source-highlighter: rouge

contractiles/intend/Intentfile.a2ml

@@ -8,7 +8,7 @@ Declared intent and purpose for Januskey.
 
 ## Purpose
 
-Januskey — Jonathan D.A. Jewell <jonathan.jewell@gmail.com>
+Januskey — Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 ## Anti-Purpose
 

crates/januskey-cli/src/main.rs

@@ -21,7 +21,7 @@ use std::path::PathBuf;
 #[command(
     name = "jk",
     version = "1.0.0",
-    author = "Jonathan D.A. Jewell <jonathan.jewell@gmail.com>",
+    author = "Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>",
     about = "JanusKey: Provably reversible file operations",
     long_about = "JanusKey makes every file operation reversible through Maximal Principle Reduction.\n\
                   Delete files, modify content, move things around—and always be able to undo.\n\n\

docs/wiki/Home.adoc

@@ -1,5 +1,5 @@
 = JanusKey Wiki
-Jonathan D.A. Jewell <jonathan.jewell@gmail.com>
+Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 :toc: left
 :toclevels: 3
 :icons: font

src/januskey/Cargo.toml

@@ -5,7 +5,7 @@
 name = "januskey"
 version = "1.0.0"
 edition = "2021"
-authors = ["Jonathan D.A. Jewell <jonathan.jewell@gmail.com>"]
+authors = ["Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>"]
 description = "Provably reversible file operations through Maximal Principle Reduction"
 license = "MIT OR PMPL-1.0-or-later"
 repository = "https://github.com/hyperpolymath/januskey"

src/januskey/src/main.rs

@@ -21,7 +21,7 @@ use std::path::PathBuf;
 #[command(
     name = "jk",
     version = "1.0.0",
-    author = "Jonathan D.A. Jewell <jonathan.jewell@gmail.com>",
+    author = "Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>",
     about = "JanusKey: Reversible file operations (formal proofs pending)",
     long_about = "JanusKey makes every file operation reversible through Maximal Principle Reduction.\n\
                   Delete files, modify content, move things around—and always be able to undo.\n\n\