async def get_keys(self) -> List[str]:
        """Get all unique keys in the store (async)."""
        session_factory, table = await self._initialize()

        async with session_factory() as session:
            result = await session.execute(select(table.c.key).distinct())
            return [row[0] for row in result.fetchall()]
Get all unique keys in the store (async).
llama-index-core/llama_index/core/storage/chat_store/sql.py