feat(biz_project+meeting): 项目+会议软删除级联, admin/manager 双角色可删

biz_project* 5 表级联 (project/plan/assign/sponsor_assign/rating) + 会议链
biz_meeting* 6 表级联 admin-only → admin/manager 可删

DB:
- 5 ALTER TABLE 加 is_deleted TINYINT DEFAULT 0 NOT NULL (biz_project/plan/assign/sponsor_assign/rating)
- biz_meeting* 6 表已有 is_deleted 列 (上轮已 ALTER)

Domain (10 文件):
- 5 个 biz_project* 加 isDeleted 字段
- 6 个 biz_meeting* 加 isDeleted 字段
- (audit_log 列名特殊: 使用 deleted 字段存操作类型, 不冲突)

Mapper 接口 (10 文件):
- 5 个 project mapper 加 softDeleteByProjectId / softDeleteByProjectNo
- 5 个 meeting mapper 加 softDeleteByMeetingId
- BizMeetingMapper 加 selectIdListByProjectId (级联调用)

Mapper XML (10 文件):
- 所有 SELECT 加 is_deleted=0 过滤 (含 JOIN 子查询)
- 加 softDeleteByXxx UPDATE (10 处)
- BizMeetingMapper.xml 的 plan LEFT JOIN 加 proj.is_deleted=0 防悬挂

Service (3 文件):
- IBizProjectService.softDeleteCascade/Batch (含会议链调用)
- IBizMeetingService.softDeleteCascade/Batch
- BizProjectServiceImpl / BizMeetingServiceImpl @Transactional(rollbackFor=Exception.class)

Controller (2 文件):
- BizProjectController.DELETE 改 admin+manager 可删
- BizMeetingController.DELETE 改 admin+manager 可删 (放宽权限)

ry-api/ruoyi-business/src/main/resources/mapper/business/BizProjectPlanMapper.xml

@@ -24,6 +24,7 @@
         <result property="createTime"    column="create_time"    />
         <result property="updateBy"    column="update_by"    />
         <result property="updateTime"    column="update_time"    />
+        <result property="isDeleted"    column="is_deleted"    />
     </resultMap>
     <sql id="selectFields">
         select p.plan_id, p.plan_name, p.plan_direction, p.plan_direction_id,
@@ -32,20 +33,21 @@
                p.project_no, p.remark, p.audit_opinion, p.audit_by, p.audit_time, p.submitter_id,
                COALESCE(bp.name, u.user_name) as submitter_name,
                proj.project_name as project_name,
-               p.create_by, p.create_time, p.update_by, p.update_time
+               p.create_by, p.create_time, p.update_by, p.update_time, p.is_deleted
         from biz_project_plan p
         left join biz_special_plan s on s.id = p.plan_direction_id
         left join sys_user u on u.user_id = p.submitter_id
         left join biz_person bp on bp.user_id = u.user_id
-        left join biz_project proj on proj.project_no = p.project_no
+        left join biz_project proj on proj.project_no = p.project_no and proj.is_deleted = 0
     </sql>
     <select id="selectByPrimaryKey" resultMap="BizProjectPlanResult" parameterType="String">
         <include refid="selectFields"/>
-        where p.plan_id = #{planId}
+        where p.plan_id = #{planId} and p.is_deleted = 0
     </select>
     <select id="selectList" resultMap="BizProjectPlanResult" parameterType="BizProjectPlan">
         <include refid="selectFields"/>
         <where>
+            p.is_deleted = 0
             <if test="planDirectionId != null"> and p.plan_direction_id = #{planDirectionId}</if>
             <if test="planCategory != null and planCategory != ''"> and p.plan_category = #{planCategory}</if>
             <if test="submitterId != null"> and p.submitter_id = #{submitterId}</if>
@@ -118,4 +120,8 @@
             #{planId}
         </foreach>
     </delete>
+    <!-- 软删除: 项目级联删除时按 projectNo 置 is_deleted=1 (biz_project_plan 用 project_no 关联项目) -->
+    <update id="softDeleteByProjectNo" parameterType="String">
+        update biz_project_plan set is_deleted = 1 where project_no = #{projectNo}
+    </update>
 </mapper>