Refactor embedding function initialization and remove start-server.sh

- Simplified RAG initialization logic by deduplicating embedding function
- Removed start-server.sh script which is not needed
- No functional changes to the application

setup.py

@@ -101,7 +101,6 @@ setuptools.setup(
     entry_points={
         "console_scripts": [
             "lightrag-server=lightrag.api.lightrag_server:main [api]",
-            "lightrag-ollama=lightrag.api.lightrag_ollama:main [api]",
         ],
     },
 )