Revert frank-default-large to CIRU runtime (DFlash2 too slow)

Restore the CIRU ROCmFPX setup that DFlash2 replaced:

- Restore jcbtc/Qwen3.8-27B-CIRU-ActiveFPX-PromptForge v2 runtime
  (native depth-4 MTP, PromptForge DualView, ROCm 7.15)
- Archive the DFlash2 Vulkan deployment files in .AGENTTRASH
- DFlash2 was retired the same day it shipped (2026-08-21) for speed
- Revert docs (deployment.md, index.md, AGENTS.md); mark dflash2 page archived
- Restored scripts are byte-identical to the pre-swap CIRU versions

.AGENTTRASH/frank-default-large.env.dflash2-vulkan-2026-08-21

@@ -0,0 +1,60 @@
+# Tunables for frank-default-large (upstream llama.cpp PR #27342 DFlash2,
+# Vulkan backend, dankclaw, Strix Halo gfx1151).
+#
+# Runtime: llama.cpp PR #27342 built with GGML_VULKAN=ON serving
+# unsloth/Qwen3.8-27B-UD-Q8_K_XL (target) with a z-lab DFlash2 drafter
+# (Qwen3.8-27B-DFlash2-Q4_K_M). Target at 31.4 GB, DFlash2 drafter at 2.0 GB.
+# Alias frank-default-large, port 52625.
+#
+# DFlash2 runs on the Vulkan (RADV) backend. Its candidate selector needs
+# TOP_K + ARGMAX, which the HIP backend does not implement. This replaced
+# the CIRU HIP runtime on 2026-08-21. See docs/dflash2-large-vulkan.md.
+#
+# WARNING: do not name any variable TEMP, HOST, or GPU_MAX_HEAP_SIZE. The
+# ROCm HIP runtime reads those bare env vars (see the 2026-08-13 TEMP
+# incident). This deployment uses Vulkan, not HIP, but the rule stays for
+# portability.
+
+# Upstream llama.cpp DFlash2 binary (PR #27342, Vulkan build).
+LLAMA_BIN=/home/dank/llama.cpp-dflash2/build-dflash2/bin/llama-server
+
+# Model files. The target (UD-Q8_K_XL) was already on disk; the DFlash2
+# drafter was added for this deployment. Both live in /home/dank/models.
+MODEL_DIR=/home/dank/models
+MODEL_FILE=Qwen3.8-27B-UD-Q8_K_XL.gguf
+DRAFT_FILE=Qwen3.8-27B-DFlash2-Q4_K_M.gguf
+
+ALIAS=frank-default-large
+BIND_ADDR=0.0.0.0
+LISTEN_PORT=52625
+
+# Serving: full native 262144 context, 1 slot. The Vulkan device reports
+# 113942 MiB; KV at 262144 x 64 KiB/cell is ~16 GiB. rocm-smi reports the
+# 64 GiB budget; trust the runtime for the addressable SVM pool.
+CTX_SIZE=262144
+PARALLEL=1
+BATCH_SIZE=4096
+UBATCH_SIZE=4096
+CACHE_TYPE_K=f16
+CACHE_TYPE_V=f16
+CTX_CHECKPOINTS=16
+CACHE_RAM=8192
+
+# DFlash2 speculative decoding. The drafter's trained block size is 8;
+# SPEC_DRAFT_N_MAX clamps to it. TOP_K selector (top 16 candidates).
+SPEC_TYPE=draft-dflash
+SPEC_DRAFT_N_MAX=8
+SPEC_DRAFT_N_MIN=0
+SPEC_DRAFT_P_MIN=0.0
+SPEC_DRAFT_P_SPLIT=0.10
+
+# Sampling (model card defaults, thinking-general).
+TEMPERATURE=0.7
+TOP_P=0.95
+
+# Thinking enabled. deepseek format moves the thinking reasoning into
+# message.reasoning_content (OpenAI-compatible).
+REASONING=on
+REASONING_FORMAT=deepseek
+
+VERBOSITY=4