refactor: Improve handling of optional fields and enhance compatibility score calculations

app/services/insight.py

@@ -26,7 +26,7 @@ class QueryProcessor:
         self.llm = ChatOpenAI(
             api_key=OPENROUTER_API_KEY,
             base_url="https://openrouter.ai/api/v1",
-            model="openai/gpt-5-nano",
+            model="openai/gpt-4o-mini",
             temperature=0,
         )
         self.agent = create_react_agent(
@@ -107,6 +107,8 @@ class QueryProcessor:
         - If you cannot find sufficient data after searching, make reasonable inferences based on available information
         - DO NOT state that data is unavailable or ambiguous - provide the best analysis possible with what you find
         - Focus on ACTIONABLE insights, not disclaimers
+        - Only call the tool twice at most, be strategic in your searches
+        - Summarize your findings concisely and clearly
         
         Provide insights in the InsightResponse schema format: