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/test/kotlin/com/gzzn/omms/msgexchange/domain/flight/FlightStateEngineTest.kt

@@ -143,6 +143,29 @@ class FlightStateEngineTest {
         assertEquals(emptyList<Map<String, String>>(), next.collections["GTDT"])
     }
 
+    @Test
+    fun `apply on DELY fails fast because protocol defines no sequence attribute`() {
+        val current = FlightNextState(
+            "F1",
+            emptyMap(),
+            mapOf("DELY" to listOf(mapOf("CODE" to "YY"))),
+            1L,
+            "m1",
+        )
+        val error = runCatching {
+            FlightStateEngine.apply(
+                current,
+                FlightFieldCommands(
+                    "F1",
+                    collections = mapOf("DELY" to CollectionCommand.Apply(mapOf("CODE" to "ZZ"), "1")),
+                ),
+                "m2",
+                bumpVersion = true,
+            )
+        }.exceptionOrNull()
+        assertTrue(error is IllegalArgumentException)
+    }
+
     @Test
     fun `exception null payload translates to explicit clear and apply records cleared key`() {
         val current = FlightNextState(