fix: fix hospital field names and handle empty escort name in paysuccess

- Fix hospital field mapping: hospitalname (not hospitalName), id (not hospitalId)
- Add loading placeholder for hospital picker before API response
- Handle null userbName in paysuccess page when escort not yet assigned
- Create rlz_order table and order_view in MySQL database

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

coupon/pages/peizhen/peizhendetail.js

@@ -121,8 +121,8 @@ Page({
           var list = [{ text: '请选择医院', value: 0 }];
           hospitals.forEach(function (h) {
             list.push({
-              text: h.hospitalName,
+              text: h.hospitalname,
-              value: h.hospitalId
+              value: h.id
             });
           });
           that.setData({ objectArray: list });

coupon/shopping/pages/paysuccess/paysuccess.wxml

@@ -23,7 +23,8 @@
     </view>
     <view class="summary-row">
       <text class="summary-label">服务类型</text>
-      <text class="summary-value">专业陪护服务（{{item.userbName}}）</text>
+      <text wx:if="{{item.userbName}}" class="summary-value">专业陪护服务（{{item.userbName}}）</text>
+      <text wx:else class="summary-value">专业陪护服务</text>
     </view>
     <view class="summary-row">
       <text class="summary-label">服务医院</text>