chore: add owner SPDX header to all .rs (satisfy licence-enforcer hook) (#139)

The pre-commit licence enforcer (`.git/hooks/pre-commit`) requires
**both** `SPDX-License-Identifier: MPL-2.0` **and** the exact owner
string `Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>` on every staged
source file — but **no `.rs` file carried the owner line**. Every `.rs`
had the SPDX identifier on line 1, yet the owner check (stricter than
the existing tree) meant any future edit to a `.rs` file was blocked by
the hook. Surfaced while fixing the audience→axial doc drift (#137).

## Changes
- Inserts `// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell
<j.d.a.jewell@open.ac.uk>` on line 2 of all **91 tracked `.rs` files**
(each already had the SPDX identifier on line 1).
- Renames the cosmetic `audience.md` temp filename in the `axial` test
to `axial.md`, completing the audience→axial sweep.

Comment-only changes plus one test-string rename. `cargo check
--all-targets` passes; the licence-enforcer hook now passes on `.rs`
edits (this commit itself passed it with hooks enabled).

Out of scope (noted, not done): `.md`/`.adoc`/`.idr` source files — the
two header-less docs are handled in #137 and the new Idris2 fixture in
#138 already carries the header; a follow-up can extend the same owner
line to remaining non-`.rs` sources if wanted.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: hyperpolymath

benches/scan_bench.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 // Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
 
 //! Benchmarks for panic-attack scan performance.

examples/attack_harness.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! Attack harness for exercising panic-attack assault flags.
 

examples/vulnerable_program.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! Example vulnerable program for testing panic-attacker
 //!

runtime/abduct/abduct-20260211191053/main.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! panic-attack: Universal stress testing and logic-based bug signature detection
 //!

runtime/amuck/main.amuck.001.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! panic-attack: Universal stress testing and logic-based bug signature detection
 //!

src/a2ml/mod.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! Minimal A2ML parser and Nickel exporter
 

src/abduct/mod.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! Abduct isolation harness for defensive lock-in and delayed-trigger testing.
 

src/adjudicate/mod.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! Adjudicate campaign-wide findings using miniKanren-style rule inference.
 

src/aggregate/mod.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! Aggregate — fold external prover output into an assail/assault report.
 //!

src/ambush/mod.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MPL-2.0
+// SPDX-FileCopyrightText: 2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 
 //! Ambush execution: run a target program while applying ambient stressors.