chore(license): an SPDX header on every source file that had none (LicenseRef-Starship-1.0) [skip ci]

The header scan (Captain Bob, 2026-11-10): 788 source files -- 351 with the
SL-1.0 header, 12 with the old name (docs/working/experiments, kept by
ruling), 31 under someone else's licence (tools/kconfig, Linux's, GPL-2.0:
kept), and 394 with none. Ruled: the SPDX form; capsules (.4th, .f18) and
proofs (.thy) left for a ruling of their own (mkcapsule's 64x16 block format,
content-addressed capsules).

253 files now begin
    SPDX-License-Identifier: LicenseRef-Starship-1.0
    Copyright (c) 2023-2026 Robert A. James
as a /* */ block (C, headers, assembly, linker scripts) or # lines (scripts,
Makefiles, Kconfig; below a shebang or a coding line); tools/mkcapsule.c,
which had the copyright line, gets the SPDX line only.

Not touched: docs/working/ (archive and old campaign material, as the
ruling kept the experiments); v4/system/post_cases.c (generated by
v4/tools/mkpost.py, "do not edit" -- the generator has the header).

Comments only: the kernel builds on amd64, aarch64, riscv64; make -C v4
test-32: 39 programs, 0 failures; every changed script parses.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2

kernel/src/v4/sk_v4.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* sk_v4.c -- StarForth v4 on bare metal: one host node at a prompt.
  *
  * The node is the golden model of the F18-derived engine (v4/src).  It comes

kernel/src/v4/sk_v4_grow.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* sk_v4_grow.c -- Artemis grows to fill the stick at its first boot
  * (docs/v4.0.0/STICK.md 5a; plan 2026-10-29-stick-5, Task 2).
  *

kernel/src/v4/sk_v4_identity.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* sk_v4_identity.c -- the identity gate for the v4 boot: no identity drive,
  * headless; Zuse's minted thumbdrive, a console.
  * docs/v4.0.0/plans/2026-10-26-engine-step4-identity-gate.md, ENGINE.md 2.

kernel/src/v4/sk_v4_marker.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* sk_v4_marker.c -- the genesis marker, version 2, for the v4 boot
  * (docs/v4.0.0/STICK.md 6, 6a; plan 2026-10-29-stick-5, Task 1).
  *

kernel/src/v4/sk_v4_mint.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* sk_v4_mint.c -- MINT-ZUSE: the real Zuse minted onto a second stick
  * (docs/v4.0.0/STICK.md 6a; plan 2026-10-29-stick-5, Task 4).
  *