fix: Initialize info variable to prevent NameError on retry failure

The yfinance retry loop could cause NameError if all retries failed
because 'info' was only defined inside the try block.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

mcp-servers/valuation-basket/server.py

@@ -66,6 +66,7 @@ def _fetch_yfinance_sync(ticker: str, max_retries: int = 3) -> dict:
     """
     import time
     last_error = None
+    info = None  # Initialize to avoid NameError if all retries fail
 
     for attempt in range(max_retries):
         try: