chore(staging): script that compares staging code with the GitHub tip

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

Author: northdpole

scripts/sync_check_staging.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# Print the stack tip on GitHub vs the commit the staging web image was built from.
+# Usage: STAGING_HOST=sg@100.74.143.62 ./scripts/sync_check_staging.sh [branch]
+set -euo pipefail
+BRANCH="${1:-feat/answer-feedback}"
+HOST="${STAGING_HOST:?set STAGING_HOST, e.g. user@host}"
+git fetch -q origin "$BRANCH"
+TIP="$(git rev-parse --short origin/"$BRANCH")"
+# Staging is rsynced from a worktree checked out at the tip; compare file content, not a SHA.
+LOCAL="$(git ls-tree -r origin/"$BRANCH" --name-only -- application/utils/comprehension | xargs -I{} git show origin/"$BRANCH":{} | shasum | cut -c1-12)"
+REMOTE="$(ssh -n -o BatchMode=yes "$HOST" 'cd /home/sg/Projects/OpenCRE && for f in $(find application/utils/comprehension -type f -name "*.py" | sort); do cat "$f"; done | shasum | cut -c1-12')"
+echo "GitHub $BRANCH tip: $TIP"
+echo "comprehension code hash  github=$LOCAL  staging=$REMOTE"