feat: 实现小程序离线巡检与可靠同步

server-go/migrations/000007_inspection_idempotency.down.sql

@@ -0,0 +1,16 @@
+DROP INDEX IF EXISTS idx_inspection_records_user_idempotency;
+
+-- 恢复全局唯一索引前，先处理跨用户重复，保留所有记录。
+UPDATE inspection_records AS r
+SET idempotency_key = r.idempotency_key || '#' || r.id
+WHERE r.idempotency_key IS NOT NULL
+  AND EXISTS (
+      SELECT 1
+      FROM inspection_records AS x
+      WHERE x.idempotency_key = r.idempotency_key
+        AND x.id <> r.id
+  );
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_inspection_records_idempotency_key
+    ON inspection_records (idempotency_key)
+    WHERE idempotency_key IS NOT NULL;