feat(aicompanion): 重构AI陪聊DO并新增文本数组处理器

- 将personalityTags字段由Object改为List<String>并引入TextArrayTypeHandler
- 在DO中增加deleted逻辑删除字段并启用autoResultMap
- 简化SaveReqVO，移除创建/更新时间字段并补充prologue等字段描述
- 新增.gitignore忽略/.omc/目录

yolo-framework/yolo-spring-boot-starter-mybatis/src/main/java/com/yolo/keyboard/framework/mybatis/core/type/TextArrayTypeHandler.java

@@ -0,0 +1,51 @@
+package com.yolo.keyboard.framework.mybatis.core.type;
+
+import org.apache.ibatis.type.BaseTypeHandler;
+import org.apache.ibatis.type.JdbcType;
+import org.apache.ibatis.type.MappedJdbcTypes;
+import org.apache.ibatis.type.MappedTypes;
+
+import java.sql.*;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * PostgreSQL text[] 数组类型处理器
+ * 将 Java List<String> 与 PostgreSQL text[] 互相转换
+ *
+ * @author ziin
+ */
+@MappedJdbcTypes(JdbcType.ARRAY)
+@MappedTypes(List.class)
+public class TextArrayTypeHandler extends BaseTypeHandler<List<String>> {
+
+    @Override
+    public void setNonNullParameter(PreparedStatement ps, int i, List<String> parameter, JdbcType jdbcType) throws SQLException {
+        Connection conn = ps.getConnection();
+        Array array = conn.createArrayOf("text", parameter.toArray(new String[0]));
+        ps.setArray(i, array);
+    }
+
+    @Override
+    public List<String> getNullableResult(ResultSet rs, String columnName) throws SQLException {
+        return toList(rs.getArray(columnName));
+    }
+
+    @Override
+    public List<String> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
+        return toList(rs.getArray(columnIndex));
+    }
+
+    @Override
+    public List<String> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
+        return toList(cs.getArray(columnIndex));
+    }
+
+    private List<String> toList(Array array) throws SQLException {
+        if (array == null) {
+            return null;
+        }
+        String[] strings = (String[]) array.getArray();
+        return Arrays.asList(strings);
+    }
+}