FABRIC-3.10.8 MC-1a: the core table, and amd64's second core online and parked

hal/smp.c: dense logical core ids, a heap-sized core table, one-at-a-time
bring-up under a 1 s bound, park-wake reporting at the idle point.
amd64: MADT enumeration, a relocation-free real->long-mode trampoline
copied below 1 MiB, INIT-SIPI-SIPI via the LAPIC ICR; QEMU -smp 2.
Core 1 reports online with GS on its own block, parks with 0 wakes;
aarch64/riscv64 report 1 core until MC-1b/c. 3-ISA acceptance clean.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/starkernel/vm/switch.c

@@ -36,6 +36,7 @@
 #include "starkernel/vm/bootstrap/sk_vm_bootstrap.h" /* sk_get_mama_vm() -- the idle root */
 #include "starkernel/percpu.h" /* FABRIC-3.10.8 MC-0a -- this core's current VM */
 #include "starkernel/spinlock.h" /* FABRIC-3.10.8 MC-0b -- no lock crosses a switch */
+#include "starkernel/smp.h"      /* FABRIC-3.10.8 MC-1 -- sk_smp_report() */
 #include <stdint.h>
 
 /* Arch-specific (switch.S in each arch dir). sk_vm_switch_prime() builds
@@ -231,6 +232,7 @@ void sk_vm_idle_point(int may_drain_self) {
      * which makes this the place to log any lock failure counted since. */
     sk_lock_check_none_held("idle point");
     sk_lock_report();
+    sk_smp_report(); /* FABRIC-3.10.8 MC-1: a parked core that woke */
 
     if (!self || self != (VM *)sk_get_mama_vm()) return;
     if (self->frames.count != 0) return; /* inside a word (KEY/EXPECT): not idle */