frank-large: swap to stock llama.cpp serving Qwen3.8-27B UD-Q8_K_XL with DFlash2

Replace the Kairic Edge ROCmFPX build with the unsloth b11030 stock
llama.cpp prebuilt (ROCm gfx1151) serving unsloth/Qwen3.8-27B-GGUF:
UD-Q8_K_XL (a 27B dense model, 31.5 GiB) with the z-lab DFlash2 Q4_K_M
drafter (depth 4) on the gfx1151 iGPU.

Serving shape: one 262,144-token conversation, q8_0 KV (the build lacks
fp8), text-only, greedy sampling, Qwen-Sharp v22.4.0 template.

- scripts/serve-frank-large.sh: stock llama.cpp + DFlash2 spec decode
- scripts/frank-large.env: new model/drafter/runtime, 262144 ctx / 1 slot
- scripts/download-frank-large.sh: per-file fetch, verify mode, idempotent
- scripts/frank-large.service: updated description
- scripts/deploy-remote.sh: updated pkill pattern + asset gates
- tests/frank_large_unit.bats: new model/runtime/spec assertions
- docs: new runbook (active), Kairic Edge runbook retired (rollback target)

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

scripts/frank-large.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=Kairic Edge (ROCmFPX v1.2, gfx1151) Qwen3.8-27B IU4 W4A4 (dankclaw, frank-large, Strix Halo iGPU)
+Description=stock llama.cpp (unsloth b11030, ROCm gfx1151) Qwen3.8-27B UD-Q8_K_XL, DFlash2 spec decode, fp8 KV, 262144 ctx / 1 slot, root systemd unit (dankclaw, frank-large, Strix Halo iGPU)
 After=network-online.target
 Wants=network-online.target
 
@@ -7,10 +7,9 @@ Wants=network-online.target
 Type=simple
 User=dank
 Group=dank
-# The engine pins staging buffers and the PLE pager's hot window; keep the
-# memlock budget unbounded so an RLIMIT smaller than the pinned set cannot
-# fail the load. Parity with the halogen quadlet's Ulimit=memlock=-1:-1 and
-# the other LLM units on this fleet.
+# The engine pins staging buffers; keep the memlock budget unbounded so an
+# RLIMIT smaller than the pinned set cannot fail the load. Parity with the
+# other LLM units on this fleet.
 LimitMEMLOCK=infinity
 Environment="FRANK_LARGE_ENV_FILE=/home/dank/serverAppConfigs/scripts/frank-large.env"
 ExecStart=/home/dank/serverAppConfigs/scripts/serve-frank-large.sh