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/config/database.py

@@ -1,37 +1,40 @@
 """
 Database and cache configuration
 """
+
 import os
 
+
 class MetaRedisConfig(type):
-    """Redis configuration""" 
+    """Redis configuration"""
+
     @property
     def HOST(cls):
-        return os.getenv('REDIS_HOST', 'localhost')
-    
+        return os.getenv("REDIS_HOST", "localhost")
+
     @property
     def PORT(cls):
-        return int(os.getenv('REDIS_PORT', 6379))
-    
+        return int(os.getenv("REDIS_PORT", 6379))
+
     @property
     def PASSWORD(cls):
-        return os.getenv('REDIS_PASSWORD', None)
-    
+        return os.getenv("REDIS_PASSWORD", None)
+
     @property
     def DB(cls):
-        return int(os.getenv('REDIS_DB', 0))
-    
+        return int(os.getenv("REDIS_DB", 0))
+
     @property
     def CONNECT_TIMEOUT(cls):
-        return int(os.getenv('REDIS_CONNECT_TIMEOUT', 5))
-    
+        return int(os.getenv("REDIS_CONNECT_TIMEOUT", 5))
+
     @property
     def SOCKET_TIMEOUT(cls):
-        return int(os.getenv('REDIS_SOCKET_TIMEOUT', 5))
-    
+        return int(os.getenv("REDIS_SOCKET_TIMEOUT", 5))
+
     @property
     def MAX_CONNECTIONS(cls):
-        return int(os.getenv('REDIS_MAX_CONNECTIONS', 10))
+        return int(os.getenv("REDIS_MAX_CONNECTIONS", 10))
 
 
 class RedisConfig(metaclass=MetaRedisConfig):
@@ -50,27 +53,27 @@ class MetaCacheConfig(type):
 
     def ENABLED(cls):
         # Forced to be off by default unless explicitly enabled by an environment variable
-        return os.getenv('CACHE_ENABLED', 'False').lower() == 'true'
+        return os.getenv("CACHE_ENABLED", "False").lower() == "true"
 
     @property
     def DEFAULT_EXPIRE(cls):
-        return int(os.getenv('CACHE_EXPIRE', 300))
+        return int(os.getenv("CACHE_EXPIRE", 300))
 
     @property
     def KLINE_CACHE_TTL(cls):
         return {
-            '1m': 5,       # K-line cache for 1 minute and 5 seconds
-            '3m': 30,      # 3 minutes K-line cache 30 seconds
-            '5m': 60,      # 5 minutes K-line cache 1 minute
-            '15m': 300,    # 15 minutes K-line cache 5 minutes
-            '30m': 300,    # 30 minutes K-line cache 5 minutes
-            '1H': 300,     # 1 hour K-line cache for 5 minutes
-            '4H': 300,     # 4 hours K-line cache for 5 minutes
-            '1D': 300,     # Daily K-line cache for 5 minutes
+            "1m": 5,  # K-line cache for 1 minute and 5 seconds
+            "3m": 30,  # 3 minutes K-line cache 30 seconds
+            "5m": 60,  # 5 minutes K-line cache 1 minute
+            "15m": 300,  # 15 minutes K-line cache 5 minutes
+            "30m": 300,  # 30 minutes K-line cache 5 minutes
+            "1H": 300,  # 1 hour K-line cache for 5 minutes
+            "4H": 300,  # 4 hours K-line cache for 5 minutes
+            "1D": 300,  # Daily K-line cache for 5 minutes
             # Compatible with lowercase
-            '1h': 300,
-            '4h': 300,
-            '1d': 300,
+            "1h": 300,
+            "4h": 300,
+            "1d": 300,
         }
 
     @property
@@ -84,4 +87,5 @@ class MetaCacheConfig(type):
 
 class CacheConfig(metaclass=MetaCacheConfig):
     """Cache configuration."""
+
     pass