test(migration): 带数据 V1.1→最新升级链验证 + DELY Apply 拒绝 (ACM2-29 P2-4)

- FlywayMigrationTest 新增升级链用例：隔离 schema 迁至 V1.1.0、写入含
  *_TXT 的存量行、一路升级到最新——断言标量数据存活、v2 追踪列默认就位、
  display 视图/backfill_todo/明细表可用、*_TXT 列按已知损失边界消失（评审 F6：
  升级前必须导出或重放，测试固化该边界）
- L2 收尾：DELY 无协议序号属性（DLNO 非法）——SEQ_ATTR 移除 DELY，Apply 对
  DELY fail fast 拒绝（语义矩阵 §2 同步口径）
- 级联回归已在 P2-2 落地（deleteByFlids/deleteDiffByDay 明细级联断言）

验证：MSGX_PG_PORT=5433 真实 PG 全量 107 用例 0 失败 0 跳过

src/main/kotlin/com/gzzn/omms/msgexchange/domain/flight/FlightStateEngine.kt

@@ -31,12 +31,12 @@ object FlightStateEngine {
         "CLDT" to "CLNO",
         "PSDT" to "PSNO",
         "CHDT" to "CHNO",
-        "DELY" to "DLNO",
         "ABTM" to "ASNO",
         "CHOT" to "CSNO",
         "ROUT" to "RTNO",
         "ERUT" to "RTNO",
     )
+    // 注意：DELY 无协议序号属性（DLNO 非法）→ 不支持 Apply；清除走空数组 Replace(空集)
 
     /** DNLD/FLOP 字段集 → 命令（出现即 Set/Replace；未出现即 Unchanged；序号 0 条目 = 显式清除标记）。 */
     fun commandsFromFields(flid: String, fields: FlightFields, snapshotReplace: Boolean): FlightFieldCommands {
@@ -96,8 +96,10 @@ object FlightStateEngine {
                 is CollectionCommand.Replace -> baseCollections[key] = cmd.items.toMutableList()
                 CollectionCommand.Clear -> baseCollections.remove(key)
                 is CollectionCommand.Apply -> {
+                    val seqAttr = SEQ_ATTR[key]
+                        ?: throw IllegalArgumentException("$key does not support Apply: protocol defines no source sequence attribute")
                     val list = baseCollections.getOrPut(key) { mutableListOf() }.toMutableList()
-                    val idx = list.indexOfFirst { it[SEQ_ATTR[key] ?: ""] == cmd.sourceSeq }
+                    val idx = list.indexOfFirst { it[seqAttr] == cmd.sourceSeq }
                     if (idx >= 0) {
                         list[idx] = cmd.item
                     } else {