Allow accessing "timestamp" field from spring_ai_chat_memory table programatically when using JdbcChatMemoryRepository #5168
Description
Expected Behavior
The timestamp should be accessible programmatically, like any other column in the chat memory table.
Current Behavior
When using JdbcChatMemoryRepository, all the details stored in the table spring_ai_chat_memory for every chat are accessible via the Message object, except for the timestamp column. This restricts UI/Chatbot-based applications from displaying the actual timestamp of every chat message. It also restricts one to sort old messages chronologically in any order. Another problem is the implementation of a standard data retention policy for chats.
It forces one to manually maintain another metadata table, causing unnecessary performance overhead and complexity.