Restructure agent chat messages with parts-based architecture (#14749)

Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-server/src/engine/core-modules/file/interfaces/file-folder.interface.ts

@@ -10,6 +10,7 @@ export enum FileFolder {
   ServerlessFunction = 'serverless-function',
   ServerlessFunctionToDelete = 'serverless-function-to-delete',
   File = 'file',
+  AgentChat = 'agent-chat',
 }
 
 registerEnumType(FileFolder, {
@@ -42,6 +43,9 @@ export const fileFolderConfigs: Record<FileFolder, FileFolderConfig> = {
   [FileFolder.File]: {
     ignoreExpirationToken: false,
   },
+  [FileFolder.AgentChat]: {
+    ignoreExpirationToken: false,
+  },
 };
 
 export type AllowedFolders = KebabCase<keyof typeof FileFolder>;