Merge db-migrations: Add Flask-Migrate support and clean up old migration system

test_migrate.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+"""Test script to verify Flask-Migrate setup"""
+
+from app import app, db, migrate
+from flask_migrate import init, migrate as _migrate, upgrade
+
+with app.app_context():
+    print("Flask app created successfully")
+    print(f"Database URI: {app.config['SQLALCHEMY_DATABASE_URI']}")
+    print(f"Migrate instance: {migrate}")
+    print(f"Available commands: {app.cli.commands}")
+    
+    # Check if 'db' command is registered
+    if 'db' in app.cli.commands:
+        print("'db' command is registered!")
+        print(f"Subcommands: {list(app.cli.commands['db'].commands.keys())}")
+    else:
+        print("ERROR: 'db' command is NOT registered!")
+        print(f"Available commands: {list(app.cli.commands.keys())}")