feat: add multi-provider LLM support with thinking configurations

Models added:
- OpenAI: GPT-5.2, GPT-5.1, GPT-5, GPT-5 Mini, GPT-5 Nano, GPT-4.1
- Anthropic: Claude Opus 4.5/4.1, Claude Sonnet 4.5/4, Claude Haiku 4.5
- Google: Gemini 3 Pro/Flash, Gemini 2.5 Flash/Flash Lite
- xAI: Grok 4, Grok 4.1 Fast (Reasoning/Non-Reasoning)

Configs updated:
- Add unified thinking_level for Gemini (maps to thinking_level for Gemini 3,
  thinking_budget for Gemini 2.5; handles Pro's lack of "minimal" support)
- Add OpenAI reasoning_effort configuration
- Add NormalizedChatGoogleGenerativeAI for consistent response handling

Fixes:
- Fix Bull/Bear researcher display truncation
- Replace ChromaDB with BM25 for memory retrieval

tradingagents/dataflows/interface.py

@@ -1,10 +1,15 @@
 from typing import Annotated
 
 # Import from vendor-specific modules
-from .local import get_YFin_data, get_finnhub_news, get_finnhub_company_insider_sentiment, get_finnhub_company_insider_transactions, get_simfin_balance_sheet, get_simfin_cashflow, get_simfin_income_statements, get_reddit_global_news, get_reddit_company_news
-from .y_finance import get_YFin_data_online, get_stock_stats_indicators_window, get_balance_sheet as get_yfinance_balance_sheet, get_cashflow as get_yfinance_cashflow, get_income_statement as get_yfinance_income_statement, get_insider_transactions as get_yfinance_insider_transactions
-from .google import get_google_news
-from .openai import get_stock_news_openai, get_global_news_openai, get_fundamentals_openai
+from .y_finance import (
+    get_YFin_data_online,
+    get_stock_stats_indicators_window,
+    get_balance_sheet as get_yfinance_balance_sheet,
+    get_cashflow as get_yfinance_cashflow,
+    get_income_statement as get_yfinance_income_statement,
+    get_insider_transactions as get_yfinance_insider_transactions,
+)
+from .yfinance_news import get_news_yfinance, get_global_news_yfinance
 from .alpha_vantage import (
     get_stock as get_alpha_vantage_stock,
     get_indicator as get_alpha_vantage_indicator,
@@ -13,7 +18,7 @@ from .alpha_vantage import (
     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
+    get_news as get_alpha_vantage_news,
 )
 from .alpha_vantage_common import AlphaVantageRateLimitError
 
@@ -44,21 +49,18 @@ TOOLS_CATEGORIES = {
         ]
     },
     "news_data": {
-        "description": "News (public/insiders, original/processed)",
+        "description": "News and insider data",
         "tools": [
             "get_news",
             "get_global_news",
-            "get_insider_sentiment",
             "get_insider_transactions",
         ]
     }
 }
 
 VENDOR_LIST = [
-    "local",
     "yfinance",
-    "openai",
-    "google"
+    "alpha_vantage",
 ]
 
 # Mapping of methods to their vendor-specific implementations
@@ -67,52 +69,39 @@ VENDOR_METHODS = {
     "get_stock_data": {
         "alpha_vantage": get_alpha_vantage_stock,
         "yfinance": get_YFin_data_online,
-        "local": get_YFin_data,
     },
     # technical_indicators
     "get_indicators": {
         "alpha_vantage": get_alpha_vantage_indicator,
         "yfinance": get_stock_stats_indicators_window,
-        "local": get_stock_stats_indicators_window
     },
     # fundamental_data
     "get_fundamentals": {
         "alpha_vantage": get_alpha_vantage_fundamentals,
-        "openai": get_fundamentals_openai,
     },
     "get_balance_sheet": {
         "alpha_vantage": get_alpha_vantage_balance_sheet,
         "yfinance": get_yfinance_balance_sheet,
-        "local": get_simfin_balance_sheet,
     },
     "get_cashflow": {
         "alpha_vantage": get_alpha_vantage_cashflow,
         "yfinance": get_yfinance_cashflow,
-        "local": get_simfin_cashflow,
     },
     "get_income_statement": {
         "alpha_vantage": get_alpha_vantage_income_statement,
         "yfinance": get_yfinance_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],
+        "yfinance": get_news_yfinance,
     },
     "get_global_news": {
-        "openai": get_global_news_openai,
-        "local": get_reddit_global_news
-    },
-    "get_insider_sentiment": {
-        "local": get_finnhub_company_insider_sentiment
+        "yfinance": get_global_news_yfinance,
     },
     "get_insider_transactions": {
         "alpha_vantage": get_alpha_vantage_insider_transactions,
         "yfinance": get_yfinance_insider_transactions,
-        "local": get_finnhub_company_insider_transactions,
     },
 }