fix(orch): use a hardware breakpoint in the fc-faults macro

fc-faults set a software breakpoint on handle_mm_fault, which writes an
int3 into guest kernel text — a guest-visible memory change the gdb
runbook's "Observer effect" section says to avoid. The FC stub advertises
hwbreak+, and fc-faults only ever sets this single breakpoint, so use a
hardware breakpoint instead.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Nikita Kalyazin <nikita.kalyazin@e2b.dev>

Author: kalyazin

packages/orchestrator/cmd/resume-build/fc-debug.gdb

@@ -23,7 +23,7 @@ define fc-faults
   else
     set $_fc_n = $arg0
   end
-  break *handle_mm_fault
+  hbreak *handle_mm_fault
   set $_fc_i = 0
   while $_fc_i < $_fc_n
     continue