frank-primary: four full-window slots, V q8_0 KV, hot expert blocks on-GPU

- CONTEXT_SIZE=1048576 / PARALLEL_SLOTS=4: four conversations, each the
  full native 262144 window (per-slot window unchanged; slots divide
  the pool, they never multiply it).
- CACHE_TYPE_V=q8_0 / CACHE_TYPE_K=f16: main KV drops 24,576 -> 18,816
  B/token (-23.4%); the shared MTP drafter's KV ignores the V type
  (measured: 2,048 MiB draft pool = the f16 law at 1,048,576 cells).
- OT_OVERRIDES: blocks 0-3 on ROCm0 and 45-47 on ROCm1 stay
  GPU-resident (2.42/2.49 GiB per block, measured); the rest stay
  CPU-computed. Measured free under load: ~4.9 GB card0 / ~3.4 GB
  card1; a 5th block on card0 lands at 2.27 GB, under the 3 GB
  checkpoint floor, so blocks are atomic and 4 is the safe fill.
- serve script: --cache-type-k/v env-wired tunables; ONE joined
  --override-tensor flag (b11030 deprecates repeated flags, and the
  loader is first-match-wins, so the specific patterns must precede
  the broad exps=CPU sweep).
- seams: the window test asserts per-slot = 262144 at 4 slots; new
  KV-type test; OT exact-value assertion pins the ordering law.

scripts/serve-frank-primary.sh

@@ -55,7 +55,8 @@ fi
 : "${SPEC_DRAFT_DEVICE:=ROCm0}"
 : "${BATCH_SIZE:=8192}"
 : "${UBATCH_SIZE:=512}"
-: "${CACHE_RAM:=16384}"
+: "${CACHE_TYPE_V:=f16}"
+: "${CACHE_TYPE_K:=f16}"
 : "${VERBOSITY:=4}"
 
 SERVER_BIN="$RUNTIME_DIR/llama-server"
@@ -108,7 +109,8 @@ ARGS=(
     --reasoning auto
     --reasoning-format deepseek
     --reasoning-budget -1
-    --flash-attn on
+    --cache-type-k "$CACHE_TYPE_K"
+    --cache-type-v "$CACHE_TYPE_V"
     --batch-size "$BATCH_SIZE"
     --ubatch-size "$UBATCH_SIZE"
     --cache-ram "$CACHE_RAM"
@@ -128,10 +130,11 @@ ARGS=(
     --min-p 0.0
 )
 
-# Comma-separated <pattern>=<backend> pairs -> repeated --override-tensor.
-IFS=',' read -ra _ots <<< "$OT_OVERRIDES"
-for ot in "${_ots[@]}"; do
-    ARGS+=(--override-tensor "$ot")
-done
+# Comma-separated <pattern>=<backend> pairs, ONE flag: b11030 logs
+# DEPRECATED for repeated --override-tensor and wants the joined list.
+# The loader applies the FIRST matching pattern per tensor, so the
+# specific block patterns must precede the broad exps=CPU sweep in
+# frank-primary.env.
+ARGS+=(--override-tensor "$OT_OVERRIDES")
 
 exec "$SERVER_BIN" "${ARGS[@]}"