gpuq data contract: declarative per-job in/out sync (pull inputs, push outputs every 120s + at exit), gpuq_sync.sh helper

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/gpuq_sync.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+# Selective repo<->bucket sync, same path convention as the worker's
+# data contract (repo-relative path, mirrored at jspace:jspace/<path>).
+#
+#   gpuq_sync.sh pull results-loop "eval_code_gate*.json"
+#   gpuq_sync.sh push results "jbar_e4b.pt"
+#   gpuq_sync.sh pull results-lens ""            # whole directory
+#
+# Use from any machine with the rclone remote configured (typically the
+# Spark) to fetch what nodes pushed, or to stage inputs nodes will pull.
+
+set -eu
+DIRN=$1
+DIR=$2
+GLOB=${3:-}
+REPO="${GPUQ_REPO:-$HOME/jspace}"
+INC=()
+[ -n "$GLOB" ] && INC=(--include "$GLOB")
+case "$DIRN" in
+  pull) rclone copy "jspace:jspace/$DIR" "$REPO/$DIR" "${INC[@]}" -v ;;
+  push) rclone copy "$REPO/$DIR" "jspace:jspace/$DIR" "${INC[@]}" -v ;;
+  *) echo "usage: gpuq_sync.sh pull|push <repo-relative-dir> [glob]"; exit 1 ;;
+esac