feat: 安全移除本地任务记录 (#108)

client/src/db_schema.py

@@ -4,7 +4,7 @@
 ``MIGRATIONS`` 末尾增加版本，不能修改已经发布的迁移。
 """
 
-SCHEMA_VERSION = 3
+SCHEMA_VERSION = 4
 
 
 MIGRATION_1 = (
@@ -142,8 +142,20 @@ MIGRATION_3 = (
 )
 
 
+MIGRATION_4 = (
+    """
+    ALTER TABLE pdd_tasks ADD COLUMN removed_at TEXT
+    """,
+    """
+    CREATE INDEX idx_pdd_tasks_visible_list
+        ON pdd_tasks(removed_at, updated_at DESC, id DESC)
+    """,
+)
+
+
 MIGRATIONS = {
     1: MIGRATION_1,
     2: MIGRATION_2,
     3: MIGRATION_3,
+    4: MIGRATION_4,
 }