chore: import upstream snapshot with attribution

open_notebook/database/migrate.py

@@ -0,0 +1,26 @@
+import asyncio
+
+from .async_migrate import AsyncMigrationManager
+
+
+class MigrationManager:
+    """
+    Synchronous wrapper around AsyncMigrationManager for backward compatibility.
+    """
+
+    def __init__(self):
+        """Initialize with async migration manager."""
+        self._async_manager = AsyncMigrationManager()
+
+    def get_current_version(self) -> int:
+        """Get current database version (sync wrapper)."""
+        return asyncio.run(self._async_manager.get_current_version())
+
+    @property
+    def needs_migration(self) -> bool:
+        """Check if migration is needed (sync wrapper)."""
+        return asyncio.run(self._async_manager.needs_migration())
+
+    def run_migration_up(self):
+        """Run migrations (sync wrapper)."""
+        asyncio.run(self._async_manager.run_migration_up())