Refactor investor-related schemas and models; update database configuration and enhance investor processing logic

app/services/querying.py

@@ -6,7 +6,7 @@ from langchain_community.agent_toolkits import SQLDatabaseToolkit
 from langchain_community.utilities import SQLDatabase
 from langchain_openai import ChatOpenAI
 from langgraph.prebuilt import create_react_agent
-from pydantic_schemas import Investor, InvestorList
+from py_schemas import InvestorList
 from settings import settings
 
 # Connect to SQLite
@@ -29,7 +29,7 @@ class QueryProcessor:
             api_key=settings.OPENROUTER_API_KEY,
             base_url="https://openrouter.ai/api/v1",
             model="google/gemini-2.5-flash-lite",
-            temperature=0,
+            temperature=0.3,
         )
         self.toolkit = SQLDatabaseToolkit(db=db, llm=self.llm)
         self.agent = create_react_agent(