feat(persistence): FLIGHT_SCHD_DISPLAY 兼容视图 + 生产读切明细权威 (ACM2-29 P2-2)

- V1.3.1 迁移：flight_schd_display 视图投影首个/第二个资源与总数（gate1/gate2/
  gate_total、chkc1/chkc2/checkin_total、belt1/belt_total、dely_code/strt），
  完整明细仍在各明细表可查；PG LATERAL 方言，11g 随 P3-B 单独提供
- 生产读路径 mapFlightRow 切 assembleDetailOnly：集合键仅由明细表重建，
  不再回退 V1.2.0 槽位/里程碑列（过渡双读仅保留在 FS7 对拍工具内）
- FlightStateEngine 正确性修复：序号属性 "0" 条目现在正确翻译为显式 Clear
  （原实现 items 非空走 Replace，会存出 GTNO=0 脏明细行）；混入常规条目的
  0 标记 fail fast 拒绝猜测（v2 §4 非法结构显式失败）
- JDBC 用例全部切 v2 写路径（persistNextStates），删除 legacy 写路径断言；
  新增：显示视图投影/替换同步用例、明细级联删除断言、引擎 0 标记语义单测

验证：MSGX_PG_PORT=5433 真实 PG ./gradlew test --rerun-tasks
97 用例 0 失败 0 跳过

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

@@ -27,7 +27,7 @@ object FlightStateEngine {
         "ERUT" to "RTNO",
     )
 
-    /** DNLD/FLOP 字段集 → 命令（出现即 Set/Replace；未出现即 Unchanged）。 */
+    /** 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 {
         val scalars = linkedMapOf<String, ScalarCommand>()
         val collections = linkedMapOf<String, CollectionCommand>()
@@ -35,15 +35,17 @@ object FlightStateEngine {
             if (key == "FLID") return@forEach
             when {
                 key in COLLECTION_KEYS -> {
-                    val items = parseCollection(value)
                     val seqAttr = SEQ_ATTR[key]
-                    if (items.isEmpty() && seqAttr != null && fieldsContainsClearOnly(value)) {
-                        collections[key] = CollectionCommand.Clear
-                    } else {
-                        collections[key] = CollectionCommand.Replace(items)
+                    val parsed = parseCollection(value)
+                    val markers = parsed.filter { seqAttr != null && it[seqAttr] == "0" }
+                    collections[key] = when {
+                        markers.isEmpty() -> CollectionCommand.Replace(parsed)
+                        markers.size == parsed.size -> CollectionCommand.Clear
+                        else -> throw IllegalArgumentException(
+                            "$key mixes explicit clear marker (seq=0) with regular items; refusing to guess",
+                        )
                     }
                 }
-                snapshotReplace -> scalars[key] = ScalarCommand.Set(value)
                 else -> scalars[key] = ScalarCommand.Set(value)
             }
         }
@@ -116,15 +118,6 @@ object FlightStateEngine {
         }
     }
 
-    private fun fieldsContainsClearOnly(raw: String): Boolean {
-        val node = runCatching { mapper.readTree(raw) }.getOrNull() ?: return false
-        if (node.isArray && node.size() == 1) {
-            val seq = node[0].fields().asSequence().firstOrNull { it.key.endsWith("NO") }?.value?.asText()
-            return seq == "0"
-        }
-        return false
-    }
-
     /** 当前库态 → FlightNextState（供增量合并）。 */
     fun fromFlightFields(flid: String, fields: FlightFields, stateVersion: Long = 0L, lastMessageId: String = ""): FlightNextState {
         val scalars = linkedMapOf<String, String>()

src/main/kotlin/com/gzzn/omms/msgexchange/infra/persistence/jdbc/JdbcPgRepositories.kt

@@ -657,7 +657,7 @@ class JdbcFlightSchdRepository(
         return totalDeleted
     }
 
-    /** 行 → 字段视图：标量列直读，集合键由明细表或槽位列重建（FS7 双读对拍见 FlightSchdReadAssembler）。 */
+    /** 行 → 字段视图：标量列直读，集合键由明细表重建（v2 §8：完整明细权威读，P2-2 起不再回退槽位列）。 */
     private fun mapFlightRow(rs: java.sql.ResultSet): Pair<String, FlightFields> {
         val flid = rs.getString("flid")
         val row = linkedMapOf<String, String?>()
@@ -665,7 +665,7 @@ class JdbcFlightSchdRepository(
             row[column] = rs.getString(column)
         }
         val detailCollections = FlightDetailTables.loadCollections(ds, flid)
-        return flid to FlightSchdReadAssembler.assembleMerged(flid, row, detailCollections)
+        return flid to FlightSchdReadAssembler.assembleDetailOnly(flid, row, detailCollections)
     }
 
     override fun findByFlid(flid: String): FlightFields? =

src/main/resources/db/migration/V1.3.1__flight_schd_display.sql

@@ -0,0 +1,57 @@
+-- flight-state-design-v2 §8 (ACM2-29 P2-2): compatibility read view.
+-- 提供「首个/第二个资源 + 总数」的运营查询投影；完整明细仍在各明细表可查。
+-- PG 专属语法（LATERAL）；Oracle 11g 方言随 P3-B 单独提供 location。
+
+CREATE OR REPLACE VIEW flight_schd_display AS
+SELECT
+  f.flid,
+  f.fday,
+  f.flno,
+  f.mvin,
+  f.sodt,
+  f.stnd,
+  f.abdg,
+  f.state_version,
+  f.last_message_id,
+
+  g1.gate                          AS gate1,
+  g2.gate                          AS gate2,
+  COALESCE(g_total.cnt, 0)         AS gate_total,
+
+  c1.chkc                          AS chkc1,
+  c2.chkc                          AS chkc2,
+  COALESCE(c_total.cnt, 0)         AS checkin_total,
+
+  b1.belt                          AS belt1,
+  COALESCE(b_total.cnt, 0)         AS belt_total,
+
+  dly.code                         AS dely_code,
+  dly.strt                         AS dely_strt
+FROM flight_schd f
+LEFT JOIN LATERAL (
+  SELECT gate FROM flight_gate WHERE flid = f.flid ORDER BY ordinal LIMIT 1 OFFSET 0
+) g1 ON TRUE
+LEFT JOIN LATERAL (
+  SELECT gate FROM flight_gate WHERE flid = f.flid ORDER BY ordinal LIMIT 1 OFFSET 1
+) g2 ON TRUE
+LEFT JOIN LATERAL (
+  SELECT count(*) AS cnt FROM flight_gate WHERE flid = f.flid
+) g_total ON TRUE
+LEFT JOIN LATERAL (
+  SELECT chkc FROM flight_checkin WHERE flid = f.flid ORDER BY ordinal LIMIT 1 OFFSET 0
+) c1 ON TRUE
+LEFT JOIN LATERAL (
+  SELECT chkc FROM flight_checkin WHERE flid = f.flid ORDER BY ordinal LIMIT 1 OFFSET 1
+) c2 ON TRUE
+LEFT JOIN LATERAL (
+  SELECT count(*) AS cnt FROM flight_checkin WHERE flid = f.flid
+) c_total ON TRUE
+LEFT JOIN LATERAL (
+  SELECT belt FROM flight_belt WHERE flid = f.flid ORDER BY ordinal LIMIT 1 OFFSET 0
+) b1 ON TRUE
+LEFT JOIN LATERAL (
+  SELECT count(*) AS cnt FROM flight_belt WHERE flid = f.flid
+) b_total ON TRUE
+LEFT JOIN LATERAL (
+  SELECT code, strt FROM flight_delay WHERE flid = f.flid ORDER BY ordinal LIMIT 1
+) dly ON TRUE;