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/symbol_name.py

@@ -12,27 +12,19 @@ Notes:
 
 from __future__ import annotations
 
-from typing import Optional
-
-import re
 import os
+from typing import Optional
 
 import requests
 
-from app.utils.logger import get_logger
 from app.data.market_symbols_seed import get_symbol_name as seed_get_symbol_name
-from app.data_sources.tencent import normalize_cn_code, normalize_hk_code
+from app.utils.logger import get_logger
 
 logger = get_logger(__name__)
 
 
 def _normalize_symbol_for_market(market: str, symbol: str) -> str:
-    m = (market or '').strip()
-    s = (symbol or '').strip().upper()
-    if m == 'CNStock':
-        return normalize_cn_code(s)
-    if m == 'HKStock':
-        return normalize_hk_code(s)
+    s = (symbol or "").strip().upper()
     return s
 
 
@@ -40,21 +32,24 @@ def _resolve_name_from_yfinance(symbol: str) -> Optional[str]:
     """
     Best-effort company name via yfinance.
     """
+
     def _try_one(sym: str) -> Optional[str]:
         import yfinance as yf
+
         t = yf.Ticker(sym)
         info = getattr(t, "info", None)
         if not isinstance(info, dict) or not info:
             return None
-        name = (info.get('longName') or info.get('shortName') or '').strip()
+        name = (info.get("longName") or info.get("shortName") or "").strip()
         return name if name else None
+
     try:
         # yfinance uses '-' for some tickers (e.g. BRK-B) while users may input 'BRK.B'
         out = _try_one(symbol)
         if out:
             return out
-        if '.' in symbol:
-            out = _try_one(symbol.replace('.', '-'))
+        if "." in symbol:
+            out = _try_one(symbol.replace(".", "-"))
             if out:
                 return out
         return None
@@ -69,7 +64,7 @@ def _resolve_name_from_finnhub(symbol: str) -> Optional[str]:
     https://finnhub.io/docs/api/company-profile2
     """
     try:
-        api_key = (os.getenv('FINNHUB_API_KEY') or '').strip()
+        api_key = (os.getenv("FINNHUB_API_KEY") or "").strip()
         if not api_key:
             return None
         url = "https://finnhub.io/api/v1/stock/profile2"
@@ -79,7 +74,7 @@ def _resolve_name_from_finnhub(symbol: str) -> Optional[str]:
         data = resp.json() if resp.text else {}
         if not isinstance(data, dict) or not data:
             return None
-        name = (data.get("name") or data.get("ticker") or '').strip()
+        name = (data.get("name") or data.get("ticker") or "").strip()
         return name if name else None
     except Exception as e:
         logger.debug(f"Finnhub name resolve failed: {symbol}: {e}")
@@ -94,7 +89,7 @@ def resolve_symbol_name(market: str, symbol: str) -> Optional[str]:
     2) Market-specific public sources
     3) Reasonable fallback (None)
     """
-    m = (market or '').strip()
+    m = (market or "").strip()
     s = _normalize_symbol_for_market(m, symbol)
     if not m or not s:
         return None
@@ -105,35 +100,24 @@ def resolve_symbol_name(market: str, symbol: str) -> Optional[str]:
         return seed
 
     # 2) Market-specific
-    if m == 'USStock':
+    if m == "USStock":
         # Prefer Finnhub if configured (more stable for company name),
         # otherwise fall back to yfinance.
         return _resolve_name_from_finnhub(s) or _resolve_name_from_yfinance(s)
 
-    # CN/HK stocks: try Tencent quote name first (no key), then yfinance best-effort.
-    if m in ('CNStock', 'HKStock'):
-        try:
-            from app.data_sources.tencent import fetch_quote
-            parts = fetch_quote(s)
-            if parts and len(parts) > 1 and parts[1]:
-                return str(parts[1]).strip()
-        except Exception:
-            pass
-        return _resolve_name_from_yfinance(s)
-
     # Crypto: at least return base ticker-like display (not a "company", but better than empty)
-    if m == 'Crypto':
-        if '/' in s:
-            base = s.split('/')[0].strip()
+    if m == "Crypto":
+        if "/" in s:
+            base = s.split("/")[0].strip()
             return base if base else None
         return s
 
     # Forex: keep as-is (e.g. EURUSD) – you can later replace with a nicer mapping if needed.
-    if m == 'Forex':
+    if m == "Forex":
         return s
 
     # Futures: keep as-is
-    if m == 'Futures':
+    if m == "Futures":
         return s
 
     return None