Add app variable metadata

scripts/migrate-app-variables-v2-db.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+DB_FILE="/opt/appfactory/data/appfactory/appfactory.db"
+
+python3 - "$DB_FILE" <<'PY'
+import sqlite3
+import sys
+
+db_file = sys.argv[1]
+con = sqlite3.connect(db_file)
+
+columns = [row[1] for row in con.execute("PRAGMA table_info(app_variables)").fetchall()]
+
+if "description" not in columns:
+    con.execute("ALTER TABLE app_variables ADD COLUMN description TEXT")
+
+if "required" not in columns:
+    con.execute("ALTER TABLE app_variables ADD COLUMN required INTEGER NOT NULL DEFAULT 0")
+
+con.commit()
+con.close()
+
+print("App variables v2 migration completed.")
+PY