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/services/__init__.py

@@ -1,10 +1,10 @@
 """
 business service layer
 """
-from app.services.kline import KlineService
+
 from app.services.backtest import BacktestService
-from app.services.strategy_compiler import StrategyCompiler
 from app.services.fast_analysis import FastAnalysisService
+from app.services.kline import KlineService
+from app.services.strategy_compiler import StrategyCompiler
 
-__all__ = ['KlineService', 'BacktestService', 'StrategyCompiler', 'FastAnalysisService']
-
+__all__ = ["KlineService", "BacktestService", "StrategyCompiler", "FastAnalysisService"]