fix: remove dummy data from sql and automate schema migrations on startup

backend/index.js

@@ -661,6 +661,21 @@ const provisionSuperAdmin = async (retries = 10, delay = 10000) => {
           PRIMARY KEY (email)
         ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
       `);
+
+      // Add slug column if it doesn't exist
+      try {
+        await connection.query('ALTER TABLE users ADD COLUMN slug VARCHAR(255) UNIQUE DEFAULT NULL');
+      } catch (err) {
+        // Ignore error if column already exists (ER_DUP_FIELDNAME)
+        if (err.code !== 'ER_DUP_FIELDNAME') console.log('Schema update note (slug):', err.message);
+      }
+
+      // Update origin enum
+      try {
+        await connection.query("ALTER TABLE attendances MODIFY COLUMN origin ENUM('WhatsApp','Instagram','Website','LinkedIn','Indicação') NOT NULL");
+      } catch (err) {
+        console.log('Schema update note (origin):', err.message);
+      }
       
       connection.release();