Added the new tables pending_receipt and loan_extension to the schema

database.sql

@@ -147,3 +147,24 @@ create table `kvs` (
   `value` varchar(64) not null default ''
 ) character set utf8mb4,
   collate utf8mb4_unicode_ci;
+
+create table `pending_receipt` (
+  `user` bigint(20) not null,
+  primary key (`user`),
+  constraint `pr_f_user`
+    foreign key(`user`) references `user`(`id`),
+  `send_time` bigint(20) not null,
+  `since_time` bigint(20) not null
+) character set utf8mb4,
+  collate utf8mb4_unicode_ci;
+
+create table `loan_extension` (
+  `loan` bigint(20) not null,
+  constraint `le_f_loan`
+    foreign key(`loan`) references `loan`(`event`),
+  `extend_time` bigint(20) not null,
+  primary key (`loan`, `extend_time`),
+  `old_end` bigint(20) not null,
+  `new_end` bigint(20) not null
+) character set utf8mb4,
+  collate utf8mb4_unicode_ci;