[xingyu.guo] feat: 1.增加逻辑删除符 2. 移除字段“学习材料的存储URL”

src/main/resources/db/migration/V20250608_1__removeMaterialUrlNotNull.sql

@@ -0,0 +1,2 @@
+alter table tasks
+    modify material_url varchar(255) null comment '学习材料的存储URL' COMMENT '上次该任务学习情况' after calculated_priority;

src/main/resources/db/migration/V20250628_1__addTableLogic.sql

@@ -0,0 +1,27 @@
+alter table flyway_schema_history
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table study_expectations
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table study_report_fragments
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table study_reports
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table study_sessions
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table tasks
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table test_table
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table user
+    add deleted int default 0 not null comment '逻辑删除符';
+
+alter table user_task
+    add deleted int default 0 not null comment '逻辑删除符';
+