feat(ingress): 实现 JDBC 信箱轮询、入站持久化与对拍测试 (U05)

src/main/kotlin/com/gzzn/omms/msgexchange/domain/MsgEvent.kt

@@ -0,0 +1,33 @@
+package com.gzzn.omms.msgexchange.domain
+
+/**
+ * ACMA-8 MSG_EVENT（统一投递事件 / outbox）。
+ * TARGET 阶段化：KAFKA:msg、KAFKA:schd 自阶段 A；ES:flight_hts、REDIS:flightInfo 仅阶段 B 投影期。
+ */
+object Targets {
+    const val KAFKA_MSG = "KAFKA:msg"
+    const val KAFKA_SCHD = "KAFKA:schd"
+    const val ES_FLIGHT_HTS = "ES:flight_hts"
+    const val REDIS_FLIGHT_INFO = "REDIS:flightInfo"
+
+    /** 阶段 A 投递目标（仅 Kafka）——I5：Delivery 阶段 A 不写 Redis。 */
+    val phaseA: List<String> = listOf(KAFKA_MSG, KAFKA_SCHD)
+
+    /** 阶段 B 追加投影目标。 */
+    val phaseB: List<String> = phaseA + listOf(ES_FLIGHT_HTS, REDIS_FLIGHT_INFO)
+}
+
+enum class EventStatus { PENDING, SENT, DEAD }
+
+data class MsgEvent(
+    val eventId: Long? = null,
+    val target: String,
+    val partitionKey: String? = null,    // schd 事件恒为 FLID（v4 显式声明）
+    val payloadJson: String,
+    val state: EventStatus = EventStatus.PENDING,
+    val attempts: Int = 0,
+    val nextAttemptAt: java.time.Instant? = null,
+    val errorClass: ErrorClass? = null,
+    val lastError: String? = null,
+    val createdAt: java.time.Instant = java.time.Instant.now(),
+)