Real per-VM log persistence: source attribution + ACL pin (FABRIC-3.md §XXVII)

Wires the previously-unused vm_log_attributed_vm() into LOG-APPEND's kernel
primitive so persisted log records carry a trustworthy source (the real
attributed VM's registry name, or "HADES" pseudo-source) instead of a
caller-supplied, trivially forgeable string. Drops src-addr/src-u from
LOG-APPEND's stack signature accordingly. Pins LOG-APPEND via bare ACL-PIN
in Artemis's own init.4th, matching BIRTH/CAPSULE-BIRTH's precedent for a
privileged word that can't reach the shared, host-portable ACL.4th.

Also fixes two console-banner nitpicks: a mis-rendering em dash (U+2014)
in the boot banner, and drops "Emergency" from the CLI banner text.

Doc corrections to artemis_sig.h/zuse_eligibility_list.h reconciling the
three fixed devblock ranges now in play. LOG-FLUSH (the intended normal
entry point) and level-aware log eviction remain open, flagged not fixed.

Re-verified clean boot to ok> on all 3 architectures after every change.
riscv64 showed one new, unrelated virtio_blk write-timeout anomaly during
Artemis's early physics self-test (self-recovered, boot unaffected,
sector doesn't map to the log region) -- flagged, not investigated.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016UNhH1mhi52i6Qihh7ZV5S

include/starkernel/log_attrib.h

@@ -0,0 +1,64 @@
+/*
+  StarForth — Steady-State Virtual Machine Runtime
+
+  Copyright (c) 2023–2025 Robert A. James
+  All rights reserved.
+
+  This file is part of the StarForth project.
+
+  Licensed under the StarForth License, Version 1.0 (the "License");
+  you may not use this file except in compliance with the License.
+
+  You may obtain a copy of the License at:
+      https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
+
+  This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  express or implied, including but not limited to the warranties of
+  merchantability, fitness for a particular purpose, and noninfringement.
+
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+/**
+ * log_attrib.h - "Which VM is currently executing" for log persistence
+ * attribution (FABRIC-3.md §XXVI follow-on, Step 4, 2026-09-13)
+ *
+ * log_message() (shim.c) is a global function called from hundreds of
+ * existing sites -- most with no VM in scope at all (boot, PCI, xHCI,
+ * driver code). Rather than thread a VM parameter through every one of
+ * those call sites (a large, invasive change for no benefit to the ones
+ * that genuinely have no VM), vm_interpret() (vm_core.c, the single
+ * dispatch entry point for ALL FORTH execution -- interactive lines,
+ * LOAD'd block content, and every VM-EXEC/MSG-DELIVER dispatch into a
+ * target VM) sets this at entry and restores the previous value at exit,
+ * save/restore style so nested vm_interpret() calls (VM-EXEC dispatching
+ * into a different VM's own dictionary, mid-interpret) attribute
+ * correctly to whichever VM is actually running at the moment
+ * log_message() fires -- not the outermost caller.
+ *
+ * NULL means "no VM is currently interpreting" -- boot sequence, PCI/
+ * xHCI/driver code, anything running outside a vm_interpret() call frame.
+ * log_message()'s own persistence hook (shim.c) treats NULL as the fixed
+ * "HADES" pseudo-source, matching the console's own existing
+ * "[HADES][LEVEL]" prefix convention for exactly this class of message.
+ */
+
+#ifndef STARKERNEL_LOG_ATTRIB_H
+#define STARKERNEL_LOG_ATTRIB_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct VM;
+
+/* vm_log_attributed_vm - The VM whose dictionary context is currently
+ * executing, or NULL if none (see this header's own doc comment). */
+struct VM *vm_log_attributed_vm(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* STARKERNEL_LOG_ATTRIB_H */