feat(bench): add scripts/bench.sh wrapper for speed-bench runs

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/bench.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Benchmarks llama-server with SPEED-Bench; see docs/operations.md#speed-bench
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+usage() {
+  echo "Usage: $0 run <name> [speed_bench args...]   # writes bench-results/<name>.json" >&2
+  echo "       $0 compare <baseline> <speculative>   # names from earlier runs" >&2
+  exit 1
+}
+
+case "${1:-}" in
+  run)
+    [ $# -ge 2 ] || usage
+    name=$2; shift 2
+    mkdir -p bench-results
+    docker compose --profile tools run --rm speed-bench --output "$name.json" "$@"
+    ;;
+  compare)
+    [ $# -eq 3 ] || usage
+    docker compose --profile tools run --rm --entrypoint python speed-bench \
+      /app/speed_bench_compare.py --baseline "$2.json" --speculative "$3.json"
+    ;;
+  *) usage ;;
+esac