playbooks: repoint the four remaining live fv-ml1 targets

homepage-regroup, mog-sec-move-to-gpu0, pull-hf-repo and serve-qwen3.5-122b
all carried runnable 'scripts/elway ana-ml2 --playbook ...' instructions or
the old 10.250.50.54 address. Each would fail today against a dead name and a
dead IP, so these are corrections rather than cosmetics. homepage-regroup is
renamed to match; the other three keep their names, which never carried the
host.

playbooks/serve-qwen3.5-122b.yaml

@@ -1,4 +1,4 @@
-# Displace mistral-small-4 (heretic) on ana-ml2 GPU 0 and serve
+# Displace mistral-small-4 (heretic) on fv-ml1 GPU 0 and serve
 # bjk110/Qwen3.5-122B-A10B-abliterated-NVFP4 (text-only) as the new `gen` model
 # (operator 2026-06-19). Weights pre-staged at /tank/aimodels/qwen3.5-122b-a10b-nvfp4
 # (incl. the repo's serving/entrypoint.sh + vllm_patches/ that the compose mounts).
@@ -6,7 +6,7 @@
 # ⚠️ Downing mistral-small-4 takes down the Worldtree CHARACTER backend (vision-intact)
 # until it's repointed — operator-acknowledged. REVERT = down qwen, up -d the heretic.
 #
-#   scripts/elway ana-ml2 --playbook playbooks/serve-qwen3.5-122b.yaml
+#   scripts/elway fv-ml1 --playbook playbooks/serve-qwen3.5-122b.yaml
 
 vars:
   compose_dir: /opt/docker/compose/qwen3.5-122b