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/BizMeetingAuditLogMapper.xml

@@ -12,21 +12,23 @@
         <result property="auditTime"     column="audit_time"     />
         <result property="auditType"     column="audit_type"     />
         <result property="auditResult"   column="audit_result"   />
+        <result property="isDeleted"     column="is_deleted"     />
     </resultMap>
 
     <sql id="selectFields">
-        select id, meeting_id, auditor, opinion, current_stage, create_time, audit_time, audit_type, audit_result
+        select id, meeting_id, auditor, opinion, current_stage, create_time, audit_time, audit_type, audit_result, is_deleted
         from biz_meeting_audit_log
     </sql>
 
     <select id="selectByPrimaryKey" resultMap="BizMeetingAuditLogResult" parameterType="Long">
         <include refid="selectFields"/>
-        where id = #{id}
+        where id = #{id} and is_deleted = 0
     </select>
 
     <select id="selectList" resultMap="BizMeetingAuditLogResult" parameterType="BizMeetingAuditLog">
         <include refid="selectFields"/>
         <where>
+            is_deleted = 0
             <if test="meetingId != null">and meeting_id = #{meetingId}</if>
             <if test="currentStage != null and currentStage != ''">and current_stage = #{currentStage}</if>
             <if test="auditor != null and auditor != ''">and auditor = #{auditor}</if>
@@ -83,4 +85,9 @@
         </foreach>
     </delete>
 
+    <!-- 软删除: admin 删除会议时级联置 is_deleted=1 (audit_log 历史保留为后续审计; 但不再随会议显示) -->
+    <update id="softDeleteByMeetingId" parameterType="Long">
+        update biz_meeting_audit_log set is_deleted = 1 where meeting_id = #{meetingId}
+    </update>
+
 </mapper>