frank-default-small: PARALLEL=3 160k, KV K q8_0 / V q5_0 + Hadamard

Reconfigure to 3 parallel 160000-ctx slots (was 1 slot). KV cache is
now asymmetric: K at q8_0, V at q5_0, both with Hadamard. The 3 slots
triple the KV, so expert blocks 27-34 are pinned back to CPU (freed
~8.7 GiB) leaving output-adjacent 35-40 on CUDA. Q8_0 model,
split-mode none, spec disabled (ik limits spec to 1 slot). AGENTS.md:
drop the scratch-port rule (test/bench processes cannot share the
single GPU with the running service anyway). Env, serve script, bats,
docs updated.

scripts/serve-frank-small.sh

@@ -5,11 +5,12 @@
 #
 # Runtime: ik_llama.cpp llama-server (ikawrakow ik_llama.cpp). The model is a
 # 35B-total / 3B-active MoE-dense hybrid with an MTP head bundled in the GGUF.
-# Single slot (PARALLEL=1, CTX 160000). Speculative decoding is disabled.
+# Three parallel slots (PARALLEL=3), each with 160000 ctx. Speculative decoding
+# is disabled (ik_llama limits spec to a single slot).
 #
-# KV cache: q6_0 with Hadamard transforms on K and V (requires a build with
-# GGML_CUDA_FA_ALL_QUANTS=ON + GGML_IQK_FA_ALL_QUANTS=ON; see the env file).
-# q8_KV crashes at init on this arch (ggml.c:5427); q6_0 is used instead.#
+# KV cache: K q8_0 + V q5_0 with Hadamard transforms (requires a build
+# with GGML_CUDA_FA_ALL_QUANTS=ON + GGML_IQK_FA_ALL_QUANTS=ON; see the env
+# file). q8_KV crashes at init on this arch (ggml.c:5427); q8_0/q5_0 work.#
 # Split mode is none: Dankserver has a single RTX 3090 and ik_llama rejects
 # split-mode graph with fewer than 2 devices (hard load error).
 
@@ -49,10 +50,10 @@ fi
 : "${BIND_ADDR:=0.0.0.0}"
 : "${LISTEN_PORT:=7770}"
 : "${CTX_SIZE:=160000}"
-: "${PARALLEL:=1}"
+: "${PARALLEL:=3}"
 : "${SPEC_TYPE:=none}"
-: "${CACHE_TYPE_K:=q6_0}"
-: "${CACHE_TYPE_V:=q6_0}"
+: "${CACHE_TYPE_K:=q8_0}"
+: "${CACHE_TYPE_V:=q5_0}"
 : "${K_CACHE_HADAMARD:=0}"
 : "${V_CACHE_HADAMARD:=0}"
 : "${SPLIT_MODE:=none}"