chore: add deploy_beta and rollback_to_main management scripts

scripts/rollback_to_main.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -e
+
+REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$REPO_DIR"
+
+echo "=== Rolling back study.qpid.pro to main branch ==="
+git checkout main
+
+if [ -f "data/notes.db.backup-main-pre-beta" ]; then
+    echo "Note: Database backup available at data/notes.db.backup-main-pre-beta"
+fi
+
+echo "Restarting study-qpid-pro container..."
+DOCKER_HOST=tcp://127.0.0.1:2375 docker restart study-qpid-pro
+
+echo "=== Rollback complete! System is running on main branch ==="