refactor(phase1): 完成包名重构 (org.example → com.superbiz.agent)

Task 4.1: 包名统一重构
- 重命名 41 个 Java 文件的包名
- 更新所有 import 语句
- 恢复枚举类（FaultCategory、DiagnosisStatus、SourceType）
- 更新测试类的 import

重构范围：
- domain/entity: 3 个实体类
- domain/model: 2 个数据类
- domain/enums: 3 个枚举类
- repository: 3 个接口
- service/session: 2 个类（接口 + 实现）
- config: 9 个配置类
- controller: 2 个控制器
- agent/tool: 4 个工具类
- client: 1 个客户端
- Main.java: 主类

验证结果：
- 编译成功，无错误
- 所有测试通过 (27/27)
  - ApiDocumentRepositoryTest: 7/7 ✅
  - CaseLibraryRepositoryTest: 6/6 ✅
  - DiagnosisRecordRepositoryTest: 6/6 ✅
  - RedisSessionManagerTest: 8/8 ✅

Progress: 21/33 tasks completed (64%)

src/test/java/com/superbiz/agent/config/ConnectionConfigTest.java

@@ -0,0 +1,64 @@
+package com.superbiz.agent.config;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.data.redis.core.RedisTemplate;
+
+import javax.sql.DataSource;
+import java.sql.Connection;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * 测试 MySQL 和 Redis 连接配置
+ */
+@SpringBootTest
+class ConnectionConfigTest {
+
+    @Autowired(required = false)
+    private DataSource dataSource;
+
+    @Autowired(required = false)
+    private RedisTemplate<String, Object> redisTemplate;
+
+    @Test
+    void testMySQLConnection() {
+        assertNotNull(dataSource, "DataSource should be configured");
+
+        try (Connection connection = dataSource.getConnection()) {
+            assertNotNull(connection, "Connection should not be null");
+            assertFalse(connection.isClosed(), "Connection should be open");
+
+            String catalog = connection.getCatalog();
+            System.out.println("✓ MySQL 连接成功！数据库: " + catalog);
+            assertEquals("superbiz_agent", catalog, "Database name should be superbiz_agent");
+
+        } catch (Exception e) {
+            fail("MySQL 连接失败: " + e.getMessage());
+        }
+    }
+
+    @Test
+    void testRedisConnection() {
+        assertNotNull(redisTemplate, "RedisTemplate should be configured");
+
+        try {
+            // 测试 PING
+            String testKey = "test:connection:" + System.currentTimeMillis();
+            String testValue = "test-value";
+
+            redisTemplate.opsForValue().set(testKey, testValue);
+            Object result = redisTemplate.opsForValue().get(testKey);
+
+            assertEquals(testValue, result, "Redis read/write should work");
+            System.out.println("✓ Redis 连接成功！读写正常");
+
+            // 清理测试数据
+            redisTemplate.delete(testKey);
+
+        } catch (Exception e) {
+            fail("Redis 连接失败: " + e.getMessage());
+        }
+    }
+}