feat: Support for Chat Flow & Agent Support for binding a single chat flow (#765)

Co-authored-by: Yu Yang <72337138+tomasyu985@users.noreply.github.com>
Co-authored-by: zengxiaohui <csu.zengxiaohui@gmail.com>
Co-authored-by: lijunwen.gigoo <lijunwen.gigoo@bytedance.com>
Co-authored-by: lvxinyu.1117 <lvxinyu.1117@bytedance.com>
Co-authored-by: liuyunchao.0510 <liuyunchao.0510@bytedance.com>
Co-authored-by: haozhenfei <37089575+haozhenfei@users.noreply.github.com>
Co-authored-by: July <jiangxujin@bytedance.com>
Co-authored-by: tecvan-fe <fanwenjie.fe@bytedance.com>

backend/domain/upload/entity/file.go

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package entity
+
+type File struct {
+	ID            int64      `json:"id"`
+	Name          string     `json:"name"`
+	FileSize      int64      `json:"file_size"`
+	TosURI        string     `json:"tos_uri"`
+	Status        FileStatus `json:"status"`
+	Comment       string     `json:"comment"`
+	Source        FileSource `json:"source"`
+	CreatorID     string     `json:"creator_id"`
+	CozeAccountID int64      `json:"coze_account_id"`
+	ContentType   string     `json:"content_type"`
+	CreatedAt     int64      `json:"created_at"`
+	UpdatedAt     int64      `json:"updated_at"`
+	Url           string     `json:"url"`
+}
+
+type FileStatus int32
+
+const (
+	FileStatusInvalid FileStatus = 0
+	FileStatusValid   FileStatus = 1
+)
+
+type FileSource int32
+
+const (
+	FileSourceAPI FileSource = 1
+)