Refactor code for improved readability and consistency

- Cleaned up whitespace and formatting in various files including http.py, language.py, logger.py, safe_exec.py, and SQL migration scripts.
- Consolidated import statements and removed unnecessary blank lines.
- Updated logging configuration for better clarity.
- Enhanced the safe execution code with improved error handling and logging.
- Removed commented-out code and unnecessary variables in backfill_zero_trades.py and other scripts.
- Added a pyproject.toml for Ruff and Vulture configuration.
- Introduced requirements-dev.txt for development dependencies.
- Removed commented-out stock entries in init.sql for cleaner migration scripts.

backend_api_python/app/utils/__init__.py

@@ -1,9 +1,9 @@
 """
 tool module
 """
-from app.utils.logger import get_logger
+
 from app.utils.cache import CacheManager
 from app.utils.http import get_retry_session
+from app.utils.logger import get_logger
 
-__all__ = ['get_logger', 'CacheManager', 'get_retry_session']
-
+__all__ = ["get_logger", "CacheManager", "get_retry_session"]