feat: 建立统一检测任务、样本链与发病事件

server-go/migrations/000005_detection_disease_events.down.sql

@@ -0,0 +1,5 @@
+ALTER TABLE lamp_tests DROP COLUMN IF EXISTS detection_task_id;
+ALTER TABLE trace_records DROP COLUMN IF EXISTS disease_event_id;
+DROP TABLE IF EXISTS disease_events CASCADE;
+DROP TABLE IF EXISTS samples CASCADE;
+DROP TABLE IF EXISTS detection_tasks CASCADE;