feat(v4): the system's UM*, UM/MOD, D+, DNEGATE, Q.* and Q./ call the ROM

MACHINE.md 2.2.  Each is its entry's address, push and ;.  Every node the
tests make carries the host ROM (host_load, Hera's births, the depth and
mesh tests' own nodes), and a division by zero inside the ROM returns to
the prompt (hosted-check).  test_host_quit's fetch outside memory moves
past the ROM's range: 16384 is the ROM's first word now the tests' system
has its ROM, as the product's always had.  dict_hash 0xfec8c47cfc6f437f.

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

capsules/v4/sys/map-64.f18

@@ -114,5 +114,11 @@ constant DSTACK-DEPTH 16369
 constant RSTACK-DEPTH 16368
 constant CFBASE 16288
 constant CFEND 16320
+constant ROM-UM* 16384
+constant ROM-UM/MOD 16385
+constant ROM-D+ 16386
+constant ROM-DNEGATE 16387
+constant ROM-Q.* 16388
+constant ROM-Q./ 16389
 constant DICT-W 8192
 constant (IMG) 14593