feat: 完成管理端聊天工作台收口

- 新增管理端聊天工作台与会话级额外知识库持久化

- 补齐发布态聊天、历史会话只读判断与答案版本切换

- 新增 chat_round 热数据与主线消息读取支撑

easyflow-commons/easyflow-common-chat-protocol/src/main/java/tech/easyflow/core/runtime/ChatRuntimeExtKeys.java

@@ -0,0 +1,35 @@
+package tech.easyflow.core.runtime;
+
+/**
+ * 聊天运行时扩展字段键。
+ */
+public final class ChatRuntimeExtKeys {
+
+    /**
+     * 会话级额外知识库 ID 列表。
+     */
+    public static final String EXTRA_KNOWLEDGE_IDS = "extraKnowledgeIds";
+
+    /**
+     * 当前请求要重答的轮次 ID。
+     */
+    public static final String REGENERATE_ROUND_ID = "regenerateRoundId";
+
+    /**
+     * 当前请求归属的轮次 ID。
+     */
+    public static final String CURRENT_ROUND_ID = "currentRoundId";
+
+    /**
+     * 当前请求归属的轮次序号。
+     */
+    public static final String CURRENT_ROUND_NO = "currentRoundNo";
+
+    /**
+     * 当前请求生成的答案版本序号。
+     */
+    public static final String CURRENT_VARIANT_INDEX = "currentVariantIndex";
+
+    private ChatRuntimeExtKeys() {
+    }
+}

easyflow-commons/easyflow-common-chat-protocol/src/main/java/tech/easyflow/core/runtime/ChatRuntimeMessage.java

@@ -16,6 +16,10 @@ public class ChatRuntimeMessage implements Serializable {
     private Date createdAt = new Date();
     private BigInteger senderId;
     private String senderName;
+    private BigInteger roundId;
+    private Integer roundNo;
+    private String messageKind;
+    private Integer variantIndex;
 
     public BigInteger getMessageId() {
         return messageId;
@@ -80,4 +84,36 @@ public class ChatRuntimeMessage implements Serializable {
     public void setSenderName(String senderName) {
         this.senderName = senderName;
     }
+
+    public BigInteger getRoundId() {
+        return roundId;
+    }
+
+    public void setRoundId(BigInteger roundId) {
+        this.roundId = roundId;
+    }
+
+    public Integer getRoundNo() {
+        return roundNo;
+    }
+
+    public void setRoundNo(Integer roundNo) {
+        this.roundNo = roundNo;
+    }
+
+    public String getMessageKind() {
+        return messageKind;
+    }
+
+    public void setMessageKind(String messageKind) {
+        this.messageKind = messageKind;
+    }
+
+    public Integer getVariantIndex() {
+        return variantIndex;
+    }
+
+    public void setVariantIndex(Integer variantIndex) {
+        this.variantIndex = variantIndex;
+    }
 }