Local Ollama (#53)

- Fix typo 'Start' 'End'
- Add llama3.1 selection
- Use 'quick_think_llm' model instead of hard-coding GPT

tradingagents/agents/utils/memory.py

@@ -9,7 +9,7 @@ class FinancialSituationMemory:
             self.embedding = "nomic-embed-text"
         else:
             self.embedding = "text-embedding-3-small"
-            self.client = OpenAI()
+        self.client = OpenAI(base_url=config["backend_url"])
         self.chroma_client = chromadb.Client(Settings(allow_reset=True))
         self.situation_collection = self.chroma_client.create_collection(name=name)