Remove database migrations after direct schema fixes

Changes:
- Removed all migration code from server.js
- Database schema fixed directly via MySQL:
  * Dropped users.role column (SSO only)
  * Dropped users.password column (SSO only)
  * Added executions.started_by column
  * Added workflows.created_by column
  * All tables now match expected schema
- Server startup will be faster without migrations

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -30,3 +30,6 @@ Thumbs.db
 *.swp
 *.swo
 *~
+
+# Claude
+Claude.md

server.js

@@ -46,24 +46,7 @@ async function initDatabase() {
       )
     `);
 
-    // Migrate existing users table to add missing columns and remove password column
+    // Database schema is managed manually - migrations removed after direct database fixes
-    try {
-      await connection.query(`ALTER TABLE users DROP COLUMN password`);
-      console.log('Removed password column (using SSO authentication)');
-    } catch (e) { /* Column doesn't exist */ }
-    try {
-      await connection.query(`ALTER TABLE users ADD COLUMN display_name VARCHAR(255) AFTER username`);
-    } catch (e) { /* Column exists */ }
-    try {
-      await connection.query(`ALTER TABLE users ADD COLUMN email VARCHAR(255) AFTER display_name`);
-    } catch (e) { /* Column exists */ }
-    try {
-      await connection.query(`ALTER TABLE users ADD COLUMN groups TEXT AFTER email`);
-    } catch (e) { /* Column exists */ }
-    try {
-      await connection.query(`ALTER TABLE users ADD COLUMN last_login TIMESTAMP NULL AFTER groups`);
-    } catch (e) { /* Column exists */ }
-    console.log('Users table migration completed');
 
     await connection.query(`
       CREATE TABLE IF NOT EXISTS workers (
@@ -106,21 +89,6 @@ async function initDatabase() {
       )
     `);
 
-    // Migrate existing executions table to allow NULL workflow_id
-    try {
-      await connection.query(`
-        ALTER TABLE executions
-        MODIFY workflow_id VARCHAR(36) NULL,
-        DROP FOREIGN KEY executions_ibfk_1
-      `);
-      console.log('Executions table migrated to allow NULL workflow_id');
-    } catch (error) {
-      // Ignore error if foreign key doesn't exist or already modified
-      if (!error.message.includes('check that column/key exists')) {
-        console.log('Migration note:', error.message);
-      }
-    }
-
     console.log('Database tables initialized successfully');
   } catch (error) {
     console.error('Database initialization error:', error);