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

init_db.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+"""Initialize the database migrations manually"""
+
+import os
+import sys
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate, init
+
+# Create a minimal Flask app
+app = Flask(__name__)
+app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get('DATABASE_URL', 'sqlite:////data/timetrack.db')
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+
+# Create db and migrate instances
+db = SQLAlchemy(app)
+migrate = Migrate(app, db)
+
+if __name__ == '__main__':
+    with app.app_context():
+        print("Initializing migration repository...")
+        try:
+            init()
+            print("Migration repository initialized successfully!")
+        except Exception as e:
+            print(f"Error: {e}")
+            sys.exit(1)