refactor(harness): remove legacy agent architecture

src/main/java/com/superbiz/agent/domain/entity/ChatSession.java

@@ -10,7 +10,7 @@ import java.time.LocalDateTime;
 
 /**
  * Chat session metadata entity.
- * Full message history remains in Redis SessionContext.
+ * Stores current Chat Run session metadata; message history is not persisted here.
  */
 @Entity
 @Table(name = "chat_session", indexes = {
@@ -61,4 +61,3 @@ public class ChatSession {
         }
     }
 }
-

src/main/java/com/superbiz/agent/domain/entity/DiagnosisRun.java

@@ -51,11 +51,11 @@ public class DiagnosisRun {
     private String answer;
 
     @Enumerated(EnumType.STRING)
-    @Column(name = "intent", length = 32)
+    @Column(name = "intent", length = 32, columnDefinition = "VARCHAR(32)")
     private IntentType intent;
 
     @Enumerated(EnumType.STRING)
-    @Column(name = "release_outcome", length = 16)
+    @Column(name = "release_outcome", length = 16, columnDefinition = "VARCHAR(16)")
     private ReleaseOutcome releaseOutcome;
 
     @JdbcTypeCode(SqlTypes.JSON)

src/main/java/com/superbiz/agent/domain/model/SessionContext.java

@@ -1,159 +0,0 @@
-package com.superbiz.agent.domain.model;
-
-import com.fasterxml.jackson.annotation.JsonIgnore;
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-import lombok.AllArgsConstructor;
-import lombok.Builder;
-import lombok.Data;
-import lombok.NoArgsConstructor;
-
-import java.io.Serializable;
-import java.time.LocalDateTime;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-/**
- * 会话上下文数据类
- * 存储在 Redis 中的会话数据
- */
-@Data
-@Builder
-@NoArgsConstructor
-@AllArgsConstructor
-@JsonIgnoreProperties(ignoreUnknown = true)
-public class SessionContext implements Serializable {
-
-    private static final long serialVersionUID = 1L;
-
-    /**
-     * 会话ID
-     */
-    private String sessionId;
-
-    /**
-     * 用户ID
-     */
-    private String userId;
-
-    /**
-     * 业务ID（订单号/请求ID等）
-     */
-    private String businessId;
-
-    /**
-     * 链路追踪ID
-     */
-    private String traceId;
-
-    /**
-     * 会话状态（ACTIVE/COMPLETED/EXPIRED）
-     */
-    private String status;
-
-    /**
-     * 工具调用历史
-     */
-    @Builder.Default
-    private List<ToolCall> toolCalls = new ArrayList<>();
-
-    /**
-     * 聊天消息历史：[{"role":"user","content":"..."}, {"role":"assistant","content":"..."}]
-     */
-    @Builder.Default
-    private List<Map<String, String>> messageHistory = new ArrayList<>();
-
-    /**
-     * 会话创建时间
-     */
-    private LocalDateTime createdAt;
-
-    /**
-     * 最后活跃时间
-     */
-    private LocalDateTime lastActiveAt;
-
-    /**
-     * 会话过期时间（秒）
-     */
-    private Long ttl;
-
-    /**
-     * 添加工具调用记录
-     */
-    public void addToolCall(ToolCall toolCall) {
-        if (this.toolCalls == null) {
-            this.toolCalls = new ArrayList<>();
-        }
-        this.toolCalls.add(toolCall);
-        this.lastActiveAt = LocalDateTime.now();
-    }
-
-    /**
-     * 添加一对聊天消息，并按消息对数裁剪窗口。
-     */
-    public void addChatMessagePair(String userQuestion, String assistantAnswer, int maxPairCount) {
-        if (this.messageHistory == null) {
-            this.messageHistory = new ArrayList<>();
-        }
-
-        Map<String, String> userMessage = new HashMap<>();
-        userMessage.put("role", "user");
-        userMessage.put("content", userQuestion);
-        this.messageHistory.add(userMessage);
-
-        Map<String, String> assistantMessage = new HashMap<>();
-        assistantMessage.put("role", "assistant");
-        assistantMessage.put("content", assistantAnswer);
-        this.messageHistory.add(assistantMessage);
-
-        int maxMessages = Math.max(maxPairCount, 0) * 2;
-        while (maxMessages > 0 && this.messageHistory.size() > maxMessages) {
-            this.messageHistory.remove(0);
-            if (!this.messageHistory.isEmpty()) {
-                this.messageHistory.remove(0);
-            }
-        }
-        this.lastActiveAt = LocalDateTime.now();
-    }
-
-    /**
-     * 获取聊天历史副本，避免调用方直接修改内部列表。
-     */
-    @JsonIgnore
-    public List<Map<String, String>> getMessageHistorySnapshot() {
-        if (this.messageHistory == null || this.messageHistory.isEmpty()) {
-            return new ArrayList<>();
-        }
-        List<Map<String, String>> snapshot = new ArrayList<>();
-        for (Map<String, String> message : this.messageHistory) {
-            snapshot.add(new HashMap<>(message));
-        }
-        return snapshot;
-    }
-
-    /**
-     * 清空聊天历史。
-     */
-    public void clearMessageHistory() {
-        if (this.messageHistory == null) {
-            this.messageHistory = new ArrayList<>();
-        } else {
-            this.messageHistory.clear();
-        }
-        this.lastActiveAt = LocalDateTime.now();
-    }
-
-    @JsonIgnore
-    public int getMessagePairCount() {
-        return this.messageHistory == null ? 0 : this.messageHistory.size() / 2;
-    }
-
-    /**
-     * 更新最后活跃时间
-     */
-    public void updateLastActiveTime() {
-        this.lastActiveAt = LocalDateTime.now();
-    }
-}