Fixed the csv_import

src/alpine_bits_python/api.py

@@ -1161,13 +1161,16 @@ async def _process_csv_import_background(
         _LOGGER.info("Starting database processing of %s", filename)
 
         # Create a new session for this background task
-        async with session_maker() as db_session:
+        db_session = await session_maker.create_session()
+        try:
             importer = CSVImporter(db_session, config)
             stats = await importer.import_csv_file(str(log_filename), hotel_code, dryrun=False)
 
             _LOGGER.info(
                 "CSV import complete for %s: %s", filename, stats
             )
+        finally:
+            await db_session.close()
     except Exception:
         _LOGGER.exception(
             "Error processing CSV import in background for %s", filename