feat: 会议劳务/会务材料分轨审核 + 注册页标题 + 下拉空值修复

会议材料分轨 (material_audit_stage 单轨 → labor/service 双轨):
- biz_meeting: labor_audit_stage/labor_compliance_approved + service_audit_stage/service_compliance_approved 四列替换原单轨两列
- StageDeriver: 单轨状态机(R/N/C0/C1/A) + 角色优先级选代表轨 + 会议物理态取两轨最小进度
- MeetingAuditStageEnum / 前端 meetingStage.js 镜像: 分轨推导 + 颜色跟随角色展示阶段(避免文案与颜色错位)
- BizMeetingController/ServiceImpl/AuditLog + mapper + MeetingStageScheduler 同步分轨字段
- MeetingDetail/Meetings/doctor/executor Meetings/ManagerProjectDetail/ManagerProjectsAssign/PublicityDetail 同步双轨

其它:
- 注册页 (执行单位/专家/支持单位) 加居中页标题
- DoctorDeptSelect/DoctorTitleSelect 空字符串统一 null, 避免挂载必填项飘红
- BizOrgMapper sponsor/executor options 加 status 字段
- sponsor/NewPerson 编辑态 orgName 只读

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

@@ -111,6 +111,7 @@
     <select id="selectSponsorOrgOptions" parameterType="BizOrg" resultType="java.util.LinkedHashMap">
         select o.org_id   as orgId,
                o.org_name  as orgName,
+               o.status    as status,
                u.user_name as userName
         from biz_org o
         join sys_user u on u.user_id = o.user_id
@@ -135,6 +136,7 @@
     <select id="selectExecutorOrgOptions" parameterType="BizOrg" resultType="java.util.LinkedHashMap">
         select o.org_id   as orgId,
                o.org_name  as orgName,
+               o.status    as status,
                u.user_name as userName
         from biz_org o
         join sys_user u on u.user_id = o.user_id