fix: datasaver for Azure

src/dataprocessor/domain/sqlite_datasaver.py

@@ -4,7 +4,9 @@ import pandas as pd
 import logging
 
 from dataclasses import dataclass
+from pathlib import Path
 from sqlalchemy.ext.asyncio import create_async_engine, AsyncEngine
+from sqlalchemy.pool import NullPool
 
 from src.dataprocessor.domain.base_datasaver import BaseDataSaver
 
@@ -21,9 +23,15 @@ class SQLiteDataSaver(BaseDataSaver):
     @classmethod
     async def create(cls, db_path: str) -> "SQLiteDataSaver":
         """Create a new instance of DataSaver."""
-        # Build the full db url
-        db_url = f"sqlite+aiosqlite:///{db_path}"
-        engine = create_async_engine(db_url, future=True)
+        # Ensure the directory exists
+        db_file = Path(db_path)
+        db_file.parent.mkdir(parents=True, exist_ok=True)
+
+        # Build the full db url with absolute path (4 slashes total)
+        db_url = f"sqlite+aiosqlite:///{db_file.as_posix()}"
+
+        # Use NullPool to avoid connection pooling issues with SQLite
+        engine = create_async_engine(db_url, poolclass=NullPool, future=True)
         return cls(db_url=db_url, engine=engine)
 
     async def save_table(