Fix config file parsing and improve backup/restore functionality

- Fix external_server.conf parsing to skip comment lines and empty lines
- Update routes.py get_db_connection() to handle comments
- Update settings.py get_external_db_connection() to handle comments
- Improve restore_backup() to use mariadb command instead of Python parsing
- Remove SQLite database creation (MariaDB only)
- Add environment detection for dump command (mariadb-dump vs mysqldump)
- Add conditional SSL flag based on Docker environment
- Fix database restore to handle MariaDB sandbox mode comments

py_app/app/db_create_scripts/setup_complete_database.py

@@ -680,14 +680,14 @@ def verify_database_setup():
         cursor.close()
         conn.close()
         
-        # Check SQLite database
-        instance_folder = os.path.abspath(os.path.join(os.path.dirname(__file__), '../../instance'))
-        sqlite_path = os.path.join(instance_folder, 'users.db')
-        
-        if os.path.exists(sqlite_path):
-            print_success("SQLite database 'users.db' exists")
-        else:
-            print_error("SQLite database 'users.db' missing")
+        # SQLite check disabled - using MariaDB only
+        # instance_folder = os.path.abspath(os.path.join(os.path.dirname(__file__), '../../instance'))
+        # sqlite_path = os.path.join(instance_folder, 'users.db')
+        # 
+        # if os.path.exists(sqlite_path):
+        #     print_success("SQLite database 'users.db' exists")
+        # else:
+        #     print_error("SQLite database 'users.db' missing")
         
         return True
         
@@ -707,7 +707,7 @@ def main():
         create_warehouse_locations_table,
         create_permissions_tables,
         create_users_table_mariadb,
-        create_sqlite_tables,
+        # create_sqlite_tables,  # Disabled - using MariaDB only
         create_database_triggers,
         populate_permissions_data,
         update_external_config,
@@ -731,7 +731,7 @@ def main():
     print(f"📅 Completed at: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}")
     print("\n📋 Setup Summary:")
     print("   • MariaDB tables created with triggers")
-    print("   • SQLite user database initialized") 
+    print("   • MariaDB users table initialized")
     print("   • Permissions system fully configured")
     print("   • Default superadmin user created (username: superadmin, password: superadmin123)")
     print("   • Configuration files updated")