ai assistants api azd azure azure ai search azure sql career chainlit container apps copilot copilot studio ef core entity framework core eshopsupport series evaluations function calling graph rag hands-on-lab langchain learning local rag series micrsoft build announcements neo4j ollama openai pc build personal update phi4 presentation python rag rag demo series semantic kernel semantic kernel hello world series sql sql server study notes series text-to-sql vpn