feat(v4): HEAT-OP[0..31] and ANTICLOCK, read by HEAT-OP@ and ANTICLOCK@

#189 -- Captain Bob, 2026-11-12: "Add HEAT-OP. If it's a huge performance
hit, we'll revert it. If not ... it stands"; a full 33-cell array, as
DECOMPOSITION.md section 7 draws it; the Stadium feed is Phase 1's.

- node.h/node.c: v4_node_heat_regs_attach; a data fetch from base+k gives
  opcode k's count, base+32 the anti-clock (the low cell at 32 bits); a
  store changes nothing. Reset detaches them.
- host_map.h: HEAT_REG at word 13824, in what was free between the
  dictionary space and SEND_TEXT; the compile-time check covers it.
  Nothing moved. map-*.f18: HEAT-OP 13824, ANTICLOCK 13856.
- image.h/image.c/mkmap.c: the image carries the address; v4_image_born
  attaches the node's own counts.
- system.f18: HEAT-OP@ ( op -- n ), op mod 32; ANTICLOCK@ ( -- n ).
  word_count 318 -> 320 (hosted 317 -> 319): dict_hash changes.
- v4-dictionary.tsv: both words; DECOMPOSITION.md 7 records the build.

Also in this batch:
- Makefile: make init installs qemu-user -- hosted-check needs it
  (Captain Bob: "Add to make init now").
- .claude/memory/rules.md, rule 5: stop and ask when something comes up
  (Captain Bob: "you are supposed to stop and ask").

Tests first (logs/20261113-005047/heat-op): test_node did not compile;
test_host_quit 3 of 1337 failed. Suite: 199 programs, 7448554 checks, 0
failures; hosted-check, the three alike. Timing: no measurable cost.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017RzZgrf7V7Zk2iczBXDRbm

Makefile

@@ -273,8 +273,11 @@ write_stick:
 # first, the nightly documents the second (scripts/nightly.sh).
 INIT_DOCS    ?= 1
 INIT_PROOFS  ?= 1
+# qemu-user: `make -C v4 hosted-check` runs the aarch64 and riscv64 hosted builds under it
+# (qemu-aarch64, qemu-riscv64; Captain Bob, 2026-11-12: "Add to make init now").
 INIT_COMMON  := build-essential make git git-lfs python3 curl ca-certificates xz-utils \
-                xorriso mtools gdisk dosfstools fdisk
+                xorriso mtools gdisk dosfstools fdisk \
+                qemu-user
 INIT_DOCPKGS := pandoc latexmk texlive-xetex texlive-latex-base texlive-latex-recommended \
                 texlive-latex-extra texlive-pictures texlive-fonts-recommended lmodern \
                 fonts-dejavu fonts-dejavu-extra doxygen graphviz