frank-small: turboquant_k8v4 KV — int8 cannot boot this model

int8_per_token_head keeps a separate fp32 scale tensor per (token,
head); Gemma4's hybrid head dims (SWA 256 / full 512) make the
per-token page bytes 4160 vs 8256, not an integer ratio, so
unify_kv_cache_spec_page_size raises NotImplementedError — nine
crash-loop restarts measured. TurboQuant k8v4 packs its block scales
inside the tensor, keeps the 2:1 page ratio, and has a dedicated
backend with an explicit Ampere path. 289,647 -> ~772k-token pool.

tests/frank_small_unit.bats

@@ -98,7 +98,7 @@ QUADLET_LARGE="$REPO_ROOT/dankclaw/frank-large/quadlet/frank-large.container"
     ! grep -q 'HALOGEN_VISION_TOWER' "$QUADLET_LARGE"
 }
 
-@test "frank-small serves the full window with int8 KV on a dedicated card" {
+@test "frank-small serves the full window with turboquant k8v4 KV on a dedicated card" {
     local maxlen kvdtype util seqs
     maxlen="$(sed -nE 's/^MAX_MODEL_LEN=([0-9]+)$/\1/p' "$ENV_FILE")"
     kvdtype="$(sed -nE 's/^KV_CACHE_DTYPE=(.+)$/\1/p' "$ENV_FILE")"
@@ -106,12 +106,13 @@ QUADLET_LARGE="$REPO_ROOT/dankclaw/frank-large/quadlet/frank-large.container"
     seqs="$(sed -nE 's/^MAX_NUM_SEQS=([0-9]+)$/\1/p' "$ENV_FILE")"
     # The model's FULL trained window (262144), not a divided one.
     [ "$maxlen" = "262144" ]
-    # int8 KV (per-token, per-head scales): fp8_e4m3 would halve the pool
-    # charge further, but the 3090 is sm_86 (Ampere) — no native fp8, and
-    # the TRITON_ATTN backend that Gemma4 forces emits cvt.e4m3x2
-    # instructions that exist only from sm_89. int8 is pure ALU dequant in
-    # the same backend, so it runs.
-    [ "$kvdtype" = "int8_per_token_head" ]
+    # TurboQuant k8v4 KV (K 8-bit, V 4-bit, in-tensor block scales,
+    # dedicated TURBOQUANT backend with an Ampere path). The int8/fp8
+    # per-token-head dtypes cannot boot this model: their separate fp32
+    # scale tensor breaks the page-size ratio between Gemma4's SWA
+    # (head_dim 256) and full-attention (head_dim 512) layers, and fp8 is
+    # hardware-dead on sm_86 anyway.
+    [ "$kvdtype" = "turboquant_k8v4" ]
     # The 3090 is dedicated to this service, so the engine may take most of
     # it; the KV pool, not the seq ceiling, caps full-context concurrency.
     [ "$util" = "0.95" ]