frank-large: cutover to flash-server v2 (abliterated Swift1.5)

Engine: halogen-flash-server 0.16.2, digest-pinned (pulled 0c61bf84).
Payload: Quat3rnion qwen38-flash-next-v2-swift15-abliterated.hgn
(66,687,678,464 B, sha256-verified) + REQUIRED n-gram table
(51,200,246,144 B @peonist 5cc17cea) + vision tower (897,916,416 B
@peonist e053f488) + shared tokenizer (6 files). Shape: 2 slots x
200192 (KV pool 400384 positions, ~10.7 GiB), MTP always-on
(HALOGEN_SPEC_ADAPT=0, card-mandated), server-side sampler at the
card's 1.0/0.95/20, MAX_TOK 8192 with the 65536/7200 coupled pair,
vision ON. Rollback = revert this commit (27B payload stays on disk).

- serve script: byte-exact gates on all three .hgn files + flat
  tokenizer, foreground podman run (ledger to the log file)
- deploy-remote: twin gates for n-gram/vision, flashnext fetch pointer
- seam: 19 tests rewritten (spec-adapt law, pool product, compaction
  math, render shape); full suite 362/362 green

scripts/frank-large.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=halogen container (peonist-ai/halogen-qwen3.8-27b, DFlash2 spec decode, 1 slot x 200700, text-only), root systemd unit (dankclaw, frank-large, Strix Halo iGPU)
+Description=halogen-flash-server container (Quat3rnion abliterated Swift1.5 of Qwen3.8-Flash-Next v2, MTP spec decode, 2 slots x 200192, vision ON), root systemd unit (dankclaw, frank-large, Strix Halo iGPU)
 After=network-online.target
 Wants=network-online.target
 
@@ -22,7 +22,7 @@ TimeoutStopSec=120
 # would otherwise leave the endpoint down until someone notices.
 Restart=always
 RestartSec=10
-# The engine mmaps 33.4 GiB of weights and keeps a multi-GiB working set
+# The engine pins ~62 GiB of v2 weights and keeps a multi-GiB working set
 # on a box that also hosts frank-small, ComfyUI and the Caddy/observability
 # stack; make it a late OOM candidate, not the first.
 OOMScoreAdjust=-500