Add Alpha Vantage API integration as primary data provider

- Replace FinnHub with Alpha Vantage API in README documentation
- Implement comprehensive Alpha Vantage modules:
  - Stock data (daily OHLCV with date filtering)
  - Technical indicators (SMA, EMA, MACD, RSI, Bollinger Bands, ATR)
  - Fundamental data (overview, balance sheet, cashflow, income statement)
  - News and sentiment data with insider transactions
- Update news analyst tools to use ticker-based news search
- Integrate Alpha Vantage vendor methods into interface routing
- Maintain backward compatibility with existing vendor system

🤖 Generated with [Claude Code](https://claude.ai/code)

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

tradingagents/dataflows/interface.py

@@ -5,6 +5,16 @@ from .local import get_YFin_data, get_finnhub_news, get_finnhub_company_insider_
 from .yahoo_finance import get_YFin_data_online, get_stock_stats_indicators_window
 from .google import get_google_news
 from .openai import get_stock_news_openai, get_global_news_openai, get_fundamentals_openai
+from .alpha_vantage import (
+    get_stock as get_alpha_vantage_stock,
+    get_indicator as get_alpha_vantage_indicator,
+    get_fundamentals as get_alpha_vantage_fundamentals,
+    get_balance_sheet as get_alpha_vantage_balance_sheet,
+    get_cashflow as get_alpha_vantage_cashflow,
+    get_income_statement as get_alpha_vantage_income_statement,
+    get_insider_transactions as get_alpha_vantage_insider_transactions,
+    get_news as get_alpha_vantage_news
+)
 
 # Configuration and routing logic
 from .config import get_config
@@ -54,29 +64,36 @@ VENDOR_LIST = [
 VENDOR_METHODS = {
     # core_stock_apis
     "get_stock_data": {
+        "alpha_vantage": get_alpha_vantage_stock,
         "yahoo_finance": get_YFin_data_online,
         "local": get_YFin_data,
     },
     # technical_indicators
     "get_indicators": {
+        "alpha_vantage": get_alpha_vantage_indicator,
         "yahoo_finance": get_stock_stats_indicators_window,
         "local": get_stock_stats_indicators_window
     },
     # fundamental_data
     "get_fundamentals": {
-        "openai": get_fundamentals_openai
+        "alpha_vantage": get_alpha_vantage_fundamentals,
+        "openai": get_fundamentals_openai,
     },
     "get_balance_sheet": {
+        "alpha_vantage": get_alpha_vantage_balance_sheet,
         "local": get_simfin_balance_sheet,
     },
     "get_cashflow": {
+        "alpha_vantage": get_alpha_vantage_cashflow,
         "local": get_simfin_cashflow,
     },
     "get_income_statement": {
+        "alpha_vantage": get_alpha_vantage_income_statement,
         "local": get_simfin_income_statements,
     },
     # news_data
     "get_news": {
+        "alpha_vantage": get_alpha_vantage_news,
         "openai": get_stock_news_openai,
         "google": get_google_news,
         "local": [get_finnhub_news, get_reddit_company_news, get_google_news],
@@ -89,6 +106,7 @@ VENDOR_METHODS = {
         "local": get_finnhub_company_insider_sentiment
     },
     "get_insider_transactions": {
+        "alpha_vantage": get_alpha_vantage_insider_transactions,
         "local": get_finnhub_company_insider_transactions,
     },
 }
@@ -131,7 +149,8 @@ def route_to_vender(method: str, *args, **kwargs):
 
     for vendor in vendors:
         if vendor not in VENDOR_METHODS[method]:
-            raise ValueError(f"Vendor '{vendor}' not supported for method '{method}'")
+            print(f"Info: Vendor '{vendor}' not supported for method '{method}', ignoring")
+            continue
 
         vendor_impl = VENDOR_METHODS[method][vendor]