refactor to use pydantic settings and WAL sqlite mode

src/migrations/env.py

@@ -5,10 +5,12 @@ from sqlalchemy import pool
 
 from alembic import context
 
+from shared.settings import Settings
+
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.
 config = context.config
-config.set_main_option('sqlalchemy.url', os.environ.get("DATABASE_PATH"))
+config.set_main_option('sqlalchemy.url', Settings().DATABASE_PATH)
 # Interpret the config file for Python logging.
 # This line sets up loggers basically.
 if config.config_file_name is not None: