major update

app/config.py

@@ -15,10 +15,14 @@ class Settings(BaseSettings):
     alpaca_api_key: str = ""
     alpaca_api_secret: str = ""
 
-    # Sentiment Provider — Gemini with Search Grounding
+    # Sentiment Provider — Gemini with Search Grounding (legacy)
     gemini_api_key: str = ""
     gemini_model: str = "gemini-2.0-flash"
 
+    # Sentiment Provider — OpenAI
+    openai_api_key: str = ""
+    openai_model: str = "gpt-4o-mini"
+
     # Fundamentals Provider — Financial Modeling Prep
     fmp_api_key: str = ""
 
@@ -30,7 +34,7 @@ class Settings(BaseSettings):
 
     # Scoring Defaults
     default_watchlist_auto_size: int = 10
-    default_rr_threshold: float = 3.0
+    default_rr_threshold: float = 1.5
 
     # Database Pool
     db_pool_size: int = 5