fix: memory (#1718)

lua/avante/types.lua

@@ -96,6 +96,7 @@ vim.g.avante_login = vim.g.avante_login
 ---@field image_paths? string[]
 ---@field tools? AvanteLLMTool[]
 ---@field tool_histories? AvanteLLMToolHistory[]
+---@field dropped_history_messages? AvanteLLMMessage[]
 ---
 ---@class AvanteGeminiMessage
 ---@field role "user"
@@ -331,11 +332,14 @@ vim.g.avante_login = vim.g.avante_login
 ---@field tool_result? AvanteLLMToolResult
 ---@field tool_use? AvanteLLMToolUse
 ---
+---@alias AvanteLLMMemorySummarizeCallback fun(dropped_history_messages: AvanteLLMMessage[]): nil
+---
 ---@class AvanteLLMStreamOptions: AvanteGeneratePromptsOptions
 ---@field session_ctx? table
 ---@field on_start AvanteLLMStartCallback
 ---@field on_chunk AvanteLLMChunkCallback
 ---@field on_stop AvanteLLMStopCallback
+---@field on_memory_summarize? AvanteLLMMemorySummarizeCallback
 ---@field on_tool_log? function(tool_name: string, log: string): nil
 ---
 ---@alias AvanteLLMToolFunc<T> fun(