mariadb -> postgres

app/core/_utils/create_maria_tables.py

@@ -1,10 +1,12 @@
+from sqlalchemy.ext.asyncio import AsyncEngine
 from app.core.models import BlockchainTask
 from app.core.models.base import AlchemyBase
 
 
-def create_maria_tables(engine):
-    """Create all tables in the database."""
+async def create_db_tables(engine: AsyncEngine):
+    """Create all tables in the database (PostgreSQL, async)."""
+    # ensure model import side-effects initialize mappers
     BlockchainTask()
-    AlchemyBase.metadata.create_all(engine)
+    async with engine.begin() as conn:
+        await conn.run_sync(AlchemyBase.metadata.create_all)
     
-