frank-dragoon: cut the endpoint over to the native v2 abliterated checkpoint

Quat3rnion/halogen-qwen3.8-flash-next-v2-abliterated is now the NATIVE
2026-10-11 v2 conversion of orcarouter's pinned BF16 (66,687,678,432 B,
LFS sha256 b5bd925f...) — 32 bytes smaller than the writer transplant it
used to ship under the same filename. The n-gram table, vision tower and
tokenizer are the stock peonist companions, hardlinked out of the swift15
payload dir: the release publishes only the main file and no source-matched
pair exists, so the engine's own tools are the referee (niah 18/18, ppl
3.968 with mean KL 0.155 against the swift15 logits, 2026-10-17).

Memory saving, per the card: HALOGEN_KV_POOL_POSITIONS 524288 -> 262144,
one pool behind both slots (boot ledger: 7.2 GiB, where the old pool
measured 14.6). HALOGEN_CTX stays 262144 so the per-request ceiling and the
harness contract (contextWindow 217088) do not move; only two MAXIMUM-length
conversations lose the ability to coexist.

Measured against the swift15 boot on identical traffic: cold prefill
+12.6 %, decode 50.0 vs 46.8 t/s, NIAH 18/18 vs 17/18, PPL +2.3 %, thinking
tokens x1.9 (the finetune's reasoning compression is gone), refusals 0/5 on
both.

scripts/frank-dragoon.service

@@ -1,5 +1,5 @@
 [Unit]
-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-dragoon, Strix Halo iGPU)
+Description=halogen-flash-server container (Quat3rnion NATIVE v2 abliterated Qwen3.8-Flash-Next, MTP spec decode, 2 slots over ONE 262144-position pool, vision ON), root systemd unit (dankclaw, frank-dragoon, Strix Halo iGPU)
 After=network-online.target
 Wants=network-online.target