remove sync alter true, add pending migration check

backend/utils/checkMigrations.js

@@ -0,0 +1,96 @@
+const fs = require("fs");
+const path = require("path");
+
+/**
+ * Check for pending database migrations
+ *
+ * Compares migration files in the filesystem against the SequelizeMeta table
+ * to determine which migrations have not yet been executed.
+ *
+ * @param {Sequelize} sequelize - Sequelize instance
+ * @returns {Promise<string[]>} Array of pending migration filenames
+ */
+async function checkPendingMigrations(sequelize) {
+  const migrationsPath = path.resolve(__dirname, "..", "migrations");
+
+  // Get all migration files from filesystem
+  const migrationFiles = fs
+    .readdirSync(migrationsPath)
+    .filter((file) => file.endsWith(".js"))
+    .sort();
+
+  // Check if SequelizeMeta table exists
+  const [results] = await sequelize.query(`
+    SELECT EXISTS (
+      SELECT FROM information_schema.tables
+      WHERE table_schema = 'public'
+      AND table_name = 'SequelizeMeta'
+    ) as exists
+  `);
+
+  if (!results[0].exists) {
+    // No migrations have ever been run
+    return migrationFiles;
+  }
+
+  // Get executed migrations from SequelizeMeta
+  const [executedMigrations] = await sequelize.query(
+    'SELECT name FROM "SequelizeMeta" ORDER BY name'
+  );
+
+  const executedSet = new Set(executedMigrations.map((row) => row.name));
+
+  // Find migrations that haven't been executed
+  const pendingMigrations = migrationFiles.filter(
+    (file) => !executedSet.has(file)
+  );
+
+  return pendingMigrations;
+}
+
+/**
+ * Get migration status summary
+ *
+ * @param {Sequelize} sequelize - Sequelize instance
+ * @returns {Promise<{executed: string[], pending: string[]}>} Migration status
+ */
+async function getMigrationStatus(sequelize) {
+  const migrationsPath = path.resolve(__dirname, "..", "migrations");
+
+  const migrationFiles = fs
+    .readdirSync(migrationsPath)
+    .filter((file) => file.endsWith(".js"))
+    .sort();
+
+  // Check if SequelizeMeta table exists
+  const [results] = await sequelize.query(`
+    SELECT EXISTS (
+      SELECT FROM information_schema.tables
+      WHERE table_schema = 'public'
+      AND table_name = 'SequelizeMeta'
+    ) as exists
+  `);
+
+  if (!results[0].exists) {
+    return {
+      executed: [],
+      pending: migrationFiles,
+    };
+  }
+
+  const [executedMigrations] = await sequelize.query(
+    'SELECT name FROM "SequelizeMeta" ORDER BY name'
+  );
+
+  const executedSet = new Set(executedMigrations.map((row) => row.name));
+
+  return {
+    executed: migrationFiles.filter((file) => executedSet.has(file)),
+    pending: migrationFiles.filter((file) => !executedSet.has(file)),
+  };
+}
+
+module.exports = {
+  checkPendingMigrations,
+  getMigrationStatus,
+};