feat(chat): 集成 FastGPT 聊天模型- 在 ChatModeType 枚举中添加 FASTGPT 选项- 新增 FastGPT 相关的实体类和请求响应类

- 实现 FastGPT聊天服务接口
- 添加 FastGPT SSE 事件监听器

ruoyi-common/ruoyi-common-chat/src/main/java/org/ruoyi/common/chat/entity/chat/FastGPTAnswerResponse.java

@@ -0,0 +1,15 @@
+package org.ruoyi.common.chat.entity.chat;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import lombok.Data;
+
+import java.util.List;
+@Data
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class FastGPTAnswerResponse {
+    private String id;
+    private String object;
+    private long created;
+    private String model;
+    private List<FastGPTChatChoice> choices;
+}

ruoyi-common/ruoyi-common-chat/src/main/java/org/ruoyi/common/chat/entity/chat/FastGPTChatChoice.java

@@ -0,0 +1,25 @@
+package org.ruoyi.common.chat.entity.chat;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Data;
+
+import java.io.Serializable;
+
+@Data
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class FastGPTChatChoice implements Serializable {
+    private long index;
+    /**
+     * 请求参数stream为true返回是delta
+     */
+    @JsonProperty("delta")
+    private Message delta;
+    /**
+     * 请求参数stream为false返回是message
+     */
+    @JsonProperty("message")
+    private Message message;
+    @JsonProperty("finish_reason")
+    private String finishReason;
+}

ruoyi-common/ruoyi-common-chat/src/main/java/org/ruoyi/common/chat/entity/chat/FastGPTChatCompletion.java

@@ -0,0 +1,41 @@
+package org.ruoyi.common.chat.entity.chat;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.experimental.SuperBuilder;
+
+import java.io.Serializable;
+
+@Data
+@SuperBuilder
+@AllArgsConstructor
+@NoArgsConstructor
+public class FastGPTChatCompletion extends ChatCompletion implements Serializable {
+
+    /**
+     * 是否使用FastGPT提供的上下文
+     */
+    private String chatId;
+
+
+    /**
+     * 是否返回详细信息;stream模式下会通过event进行区分，非stream模式结果保存在responseData中.
+     */
+    private boolean detail;
+
+
+    /**
+     * 运行时变量
+     * 模块变量，一个对象，会替换模块中，输入fastgpt框内容里的{{key}}
+     */
+    private Variables variables;
+
+    /**
+     * responseChatItemId: string | undefined 。
+     * 如果传入，则会将该值作为本次对话的响应消息的 ID，
+     * FastGPT 会自动将该 ID 存入数据库。请确保，
+     * 在当前chatId下，responseChatItemId是唯一的。
+     */
+    private String responseChatItemId;
+}

ruoyi-common/ruoyi-common-chat/src/main/java/org/ruoyi/common/chat/entity/chat/Variables.java

@@ -0,0 +1,20 @@
+package org.ruoyi.common.chat.entity.chat;
+
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class Variables implements Serializable {
+
+    private String uid;
+
+    private String name;
+}