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/ProcState.kt

@@ -0,0 +1,25 @@
+package com.gzzn.omms.msgexchange.domain
+
+/**
+ * ACMA-8 数据模型 / PROC_STATE 状态机（六迁移表）。
+ */
+enum class ProcStatus { PENDING, FAILED, SUCCEEDED, SKIPPED, DEAD }
+
+enum class ErrorClass { MALFORMED, CODEC_ERROR, EXHAUSTED, INFRA, UNSUPPORTED }
+
+data class ProcState(
+    val cminmsgsId: Long,
+    val state: ProcStatus,
+    val identityKey: String? = null,     // decode 后首次绑定；FAILED 重试不重绑（I3）
+    val attempts: Int = 0,
+    val nextAttemptAt: java.time.Instant? = null,
+    val errorClass: ErrorClass? = null,
+    val lastError: String? = null,
+    val updatedAt: java.time.Instant = java.time.Instant.now(),
+) {
+    val isTerminal: Boolean
+        get() = state == ProcStatus.SUCCEEDED || state == ProcStatus.SKIPPED || state == ProcStatus.DEAD
+
+    /** 终态皆可归档（矩阵 #12：SUCCEEDED ∪ SKIPPED ∪ DEAD）；PENDING/FAILED 不迁。 */
+    val archivable: Boolean get() = isTerminal
+}