feat(watch): 支持设备观看与登录合并

sql/migrate-k106-anonymous-watch.sql

@@ -0,0 +1,24 @@
+-- 观看进度与观看流水支持 deviceId 归属；登录时由账号事务合并。
+
+ALTER TABLE watch_progress
+    ADD COLUMN IF NOT EXISTS device_id VARCHAR(128) NOT NULL DEFAULT '';
+ALTER TABLE watch_progress
+    ALTER COLUMN user_id DROP NOT NULL;
+DROP INDEX IF EXISTS uk_watch_progress;
+CREATE UNIQUE INDEX IF NOT EXISTS uk_watch_progress_user
+    ON watch_progress (user_id, drama_id)
+    WHERE user_id IS NOT NULL;
+CREATE UNIQUE INDEX IF NOT EXISTS uk_watch_progress_device
+    ON watch_progress (device_id, drama_id)
+    WHERE user_id IS NULL AND device_id <> '';
+CREATE INDEX IF NOT EXISTS idx_watch_progress_device
+    ON watch_progress (device_id, updated_at DESC)
+    WHERE device_id <> '';
+
+ALTER TABLE watch_history
+    ADD COLUMN IF NOT EXISTS device_id VARCHAR(128) NOT NULL DEFAULT '';
+ALTER TABLE watch_history
+    ALTER COLUMN user_id DROP NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_watch_history_device
+    ON watch_history (device_id, watched_at DESC)
+    WHERE user_id IS NULL AND device_id <> '';