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/http.py

@@ -1,24 +1,23 @@
 """
 HTTP tool module
 """
+
 import requests
 from requests.adapters import HTTPAdapter
 from urllib3.util.retry import Retry
 
 
 def get_retry_session(
-    retries: int = 3,
-    backoff_factor: float = 0.5,
-    status_forcelist: tuple = (500, 502, 503, 504)
+    retries: int = 3, backoff_factor: float = 0.5, status_forcelist: tuple = (500, 502, 503, 504)
 ) -> requests.Session:
     """
     Get HTTP Session with retry mechanism
-    
+
     Args:
         retries: number of retries
         backoff_factor: retry interval factor
         status_forcelist: HTTP status codes that need to be retried
-        
+
     Returns:
         Configured Session instance
     """
@@ -31,11 +30,10 @@ def get_retry_session(
         status_forcelist=status_forcelist,
     )
     adapter = HTTPAdapter(max_retries=retry)
-    session.mount('http://', adapter)
-    session.mount('https://', adapter)
+    session.mount("http://", adapter)
+    session.mount("https://", adapter)
     return session
 
 
 # Global shared session
 global_session = get_retry_session()
-