cleanup: remove --bf16 flag from precompute scripts and Argo template

Binary no longer accepts --bf16 (single f32 format). Removed from:
- scripts/argo-precompute.sh
- infra/k8s/argo/precompute-features-template.yaml

PVC fxcache cleaned: deleted 2.4GB old bf16 cache from feature-cache-pvc.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/argo-precompute.sh

@@ -3,7 +3,6 @@
 #
 # Usage:
 #   ./scripts/argo-precompute.sh ES.FUT
-#   ./scripts/argo-precompute.sh ES.FUT --bf16
 #   ./scripts/argo-precompute.sh ES.FUT --pool platform --watch
 #
 # Requires: argo CLI
@@ -11,7 +10,6 @@ set -euo pipefail
 
 TEMPLATE="precompute-features"
 POOL=""
-BF16=""
 DATA_DIR=""
 MBP10_DIR=""
 TRADES_DIR=""
@@ -23,7 +21,6 @@ usage() {
 Usage: $(basename "$0") <symbol> [OPTIONS]
 
 Options:
-  --bf16               Write bf16 format (version 2)
   --pool <name>        Node pool (default: ci-compile-cpu)
   --data-dir <dir>     OHLCV data dir (default: /data/futures-baseline)
   --mbp10-dir <dir>    MBP-10 data dir (default: /data/futures-baseline-mbp10)
@@ -42,7 +39,6 @@ SYMBOL="$1"; shift
 
 while [[ $# -gt 0 ]]; do
   case $1 in
-    --bf16)       BF16="true"; shift ;;
     --pool)       POOL="$2"; shift 2 ;;
     --data-dir)   DATA_DIR="$2"; shift 2 ;;
     --mbp10-dir)  MBP10_DIR="$2"; shift 2 ;;
@@ -57,7 +53,6 @@ done
 CMD="argo submit -n foxhunt --from=wftmpl/$TEMPLATE"
 CMD="$CMD -p symbol=$SYMBOL"
 
-[[ -n "$BF16" ]]       && CMD="$CMD -p bf16=$BF16"
 [[ -n "$POOL" ]]       && CMD="$CMD -p node-pool=$POOL"
 [[ -n "$DATA_DIR" ]]   && CMD="$CMD -p data-dir=$DATA_DIR"
 [[ -n "$MBP10_DIR" ]]  && CMD="$CMD -p mbp10-dir=$MBP10_DIR"
@@ -70,7 +65,6 @@ fi
 
 echo "Submitting feature pre-compute workflow..."
 echo "  symbol: $SYMBOL"
-[[ -n "$BF16" ]] && echo "  bf16:   $BF16"
 [[ -n "$POOL" ]] && echo "  pool:   $POOL"
 echo ""
 eval "$CMD"