Restore historical Q6 large model runtime

tests/frank_large_config.bats

@@ -46,15 +46,15 @@ TEMPLATE_FILE="$REPO_ROOT/scripts/chat-template.jinja"
     grep -q 'preserve_reasoning":true' "$ENV_FILE"
 }
 
-@test "frank-default-large uses Turbo4 only for the V cache" {
+@test "frank-default-large uses f16 for both KV cache sides" {
     grep -q '^CACHE_TYPE_K=f16$' "$ENV_FILE"
-    grep -q '^CACHE_TYPE_V=turbo4$' "$ENV_FILE"
+    grep -q '^CACHE_TYPE_V=f16$' "$ENV_FILE"
     grep -qF -- '-ctk "$CACHE_TYPE_K" -ctv "$CACHE_TYPE_V"' "$SERVE_FILE"
 }
 
 @test "frank-default-large exposes a swappable ubatch" {
-    grep -q '^UBATCH_SIZE=512$' "$ENV_FILE"
-    grep -q ': "${UBATCH_SIZE:=512}"' "$SERVE_FILE"
+    grep -q '^UBATCH_SIZE=4096$' "$ENV_FILE"
+    grep -q ': "${UBATCH_SIZE:=4096}"' "$SERVE_FILE"
     grep -q -- '-ub "$UBATCH_SIZE"' "$SERVE_FILE"
 }