fix(codec): CHDT 类字段统一为 SIS 口径 CCLS/CTYP（ACM2-90）

- ChdtXml wire 绑定与 SisWireMapper 映射键改为 CCLS/CTYP（implementation.md「动态运行事件」）
- 新增 V2 迁移将自有 PG FLIGHT_CHUTE 列 chcls/chtyp 更名为 ccls/ctyp，不动已发布的 V1
- FlywayMigrationTest 更新迁移链断言并校验更名后列；补 CHDT 解码→合并往返用例

src/test/kotlin/com/gzzn/omms/msgexchange/codec/JacksonXmlCodecTest.kt

@@ -1,6 +1,10 @@
 package com.gzzn.omms.msgexchange.codec
 
 import com.gzzn.omms.msgexchange.domain.MsgKind
+import com.gzzn.omms.msgexchange.domain.flight.FlightSnapshot
+import com.gzzn.omms.msgexchange.domain.flight.FlightState
+import com.gzzn.omms.msgexchange.domain.flight.FlightStateEngine
+import com.gzzn.omms.msgexchange.domain.flight.MergeChange
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Assertions.assertFalse
 import org.junit.jupiter.api.Assertions.assertInstanceOf
@@ -271,4 +275,36 @@ class JacksonXmlCodecTest {
         assertEquals(MsgKind.Unsupported("FLOP-CNCL"), (codec.decode(raw("CNCL")) as DecodeResult.Ok).message.kind)
         assertEquals(MsgKind.Unsupported("FLOP-"), (codec.decode(raw("")) as DecodeResult.Ok).message.kind)
     }
+
+    @Test
+    fun `CHDT round trip keeps SIS class fields CCLS and CTYP from decode to merged state`() {
+        val raw = """
+            <MSG><META><SNDR>AODB</SNDR><SEQN>9</SEQN><DTTM>20021010090311</DTTM>
+            <TYPE>FLOP</TYPE><STYP>CHDT</STYP></META>
+            <FLOP><FLID>121112312</FLID>
+              <CHDT CHNO="1"><CHUT>C01</CHUT><CCLS>A</CCLS><CTYP>IN</CTYP></CHDT>
+            </FLOP></MSG>
+        """.trimIndent()
+
+        val payload = ((codec.decode(raw) as DecodeResult.Ok).message.body as FlopPayload)
+
+        // wire 层：CCLS/CTYP 键在、CHCLS/CHTYP 键不在
+        val row = payload.collections.getValue("CHDT").single()
+        assertEquals("A", row["CCLS"])
+        assertEquals("IN", row["CTYP"])
+        assertFalse(row.containsKey("CHCLS"))
+        assertFalse(row.containsKey("CHTYP"))
+
+        // 合并层：MergeChange 带进航班快照的 CHDT 明细
+        val current = FlightSnapshot(
+            "121112312", java.time.LocalDate.of(2026, 12, 15), FlightState.ACTIVE, 1,
+            scalars = mapOf("FLNO" to "CA001"),
+            collections = emptyMap(),
+        )
+        val next = FlightStateEngine.mergedState(
+            current,
+            MergeChange("121112312", scalars = emptyMap(), collections = payload.collections),
+        )
+        assertEquals(listOf(row), next.collections["CHDT"])
+    }
 }

src/test/kotlin/com/gzzn/omms/msgexchange/infra/persistence/jdbc/FlywayMigrationTest.kt

@@ -10,10 +10,11 @@ import org.junit.jupiter.api.Test
 import java.sql.DriverManager
 
 /**
- * 在真实 PostgreSQL 上跑一遍迁移，确认结果符合预期：单基线 `V1__flight_state_baseline.sql`
- * 执行成功且是唯一的迁移记录，该建的表和单行种子（PIPELINE_LOCK、INBOX_CURSOR）都在，
- * 回填事实与收报水位都落在基线里，`BACKFILL_TODO`、`idx_evt_flid`、`PROC_STATE` 的处理开始
- * 时间列都不复存在——这些正是原 V2–V10 合并后的净结构。
+ * 在真实 PostgreSQL 上跑一遍迁移链，确认结果符合预期：`V1__flight_state_baseline.sql`
+ * 基线加 `V2__flight_chute_class_type_rename.sql` 更名依序执行成功，该建的表和单行种子
+ * （PIPELINE_LOCK、INBOX_CURSOR）都在，回填事实与收报水位都落在基线里，`BACKFILL_TODO`、
+ * `idx_evt_flid`、`PROC_STATE` 的处理开始时间列都不复存在；FLIGHT_CHUTE 的类字段列
+ * 已由 V2 更名为 CCLS/CTYP（SIS 口径）。
  *
  * 没有可用的 PostgreSQL 时跳过（不假装通过）。
  */
@@ -42,7 +43,7 @@ class FlywayMigrationTest {
 
         DriverManager.getConnection(url, user, pass).use { conn ->
             conn.createStatement().use { stmt ->
-                // 单基线：原 V1–V10 已合并为一条迁移，历史里只应留下 V1
+                // 迁移链：V1 基线 + V2 类字段更名，依序成功
                 stmt.executeQuery(
                     "SELECT version, script, success FROM flyway_schema_history ORDER BY installed_rank ASC",
                 ).use { rs ->
@@ -50,12 +51,24 @@ class FlywayMigrationTest {
                     while (rs.next()) {
                         records.add(Triple(rs.getString("version"), rs.getString("script"), rs.getBoolean("success")))
                     }
-                    assertEquals(1, records.size, "迁移链必须收敛为单基线，不得再有 V2+ 条目")
+                    assertEquals(2, records.size, "迁移链应为 V1 基线 + V2 更名两条")
                     assertEquals("1", records[0].first)
                     assertEquals("V1__flight_state_baseline.sql", records[0].second)
+                    assertEquals("2", records[1].first)
+                    assertEquals("V2__flight_chute_class_type_rename.sql", records[1].second)
                     assertTrue(records.all { it.third })
                 }
 
+                // V2 更名后 FLIGHT_CHUTE 类字段为 SIS 口径的 ccls/ctyp，CHCLS/CHTYP 不复存在
+                stmt.executeQuery(
+                    "SELECT column_name FROM information_schema.columns WHERE table_name = 'flight_chute' " +
+                        "AND column_name IN ('ccls', 'ctyp', 'chcls', 'chtyp')",
+                ).use { rs ->
+                    val cols = mutableSetOf<String>()
+                    while (rs.next()) cols.add(rs.getString("column_name"))
+                    assertEquals(setOf("ccls", "ctyp"), cols, "FLIGHT_CHUTE 类字段必须已更名为 ccls/ctyp")
+                }
+
                 // 全表就绪（回填事实并入 PROC_STATE，基线不再建 BACKFILL_TODO）
                 stmt.executeQuery(
                     "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'",