feat: scaffold Micronaut+Kotlin service per ACMA-8 v4 architecture

- 4 modules (ingress/processing/delivery/reference) + codec + infra + jobs
- Flyway V2.0.0: six aux tables (PROC_STATE/MSG_EVENT/REF_DATA/REQ_TRACK/PUMP_JOB/FLIGHT_STATE)
- Lua: snapshot_replace (atomic cover+gen-diff-delete), batch_delete (3:30 sweep)
- config: env-externalized secrets, phase A/B switch, ACMA-8 param-table defaults
- logback: logstash TCP JSON + traceId MDC
- pure-logic tests: identity (I3), schd aggregation max-by-EVENT_ID (FIX #7)
- build verified: gradle compile+test green on JDK 25 (Micronaut 5.1 requires JVM 25+)

Migrated from legacy repo subdirectory per repo-strategy decision (separate repo
per service, org convention). Refs: ACMA-9, ACMA-8 v4, ACMA-6

src/test/kotlin/com/gzzn/omms/msgexchange/nextgen/delivery/SchdAggregationTest.kt

@@ -0,0 +1,56 @@
+package com.gzzn.omms.msgexchange.nextgen.delivery
+
+import com.gzzn.omms.msgexchange.nextgen.domain.EventStatus
+import com.gzzn.omms.msgexchange.nextgen.domain.MsgEvent
+import com.gzzn.omms.msgexchange.nextgen.domain.Targets
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+
+/**
+ * ACMA-8 流程 3 / 兼容矩阵 #7（FIX）：同一 FLID 多次变更只发最新一态；
+ * v4 显式“组内取 EVENT_ID 最大”，不依赖集合遍历序。
+ */
+class SchdAggregationTest {
+
+    private fun ev(flid: String, eventId: Long, payload: String) = MsgEvent(
+        eventId = eventId,
+        target = Targets.KAFKA_SCHD,
+        partitionKey = flid,
+        payloadJson = payload,
+        state = EventStatus.PENDING,
+    )
+
+    @Test
+    fun `same flight collapsed to max EVENT_ID`() {
+        val pending = listOf(
+            ev("F1", 1, """{"FLID":"F1","v":"old"}"""),
+            ev("F2", 2, """{"FLID":"F2","v":"only"}"""),
+            ev("F1", 3, """{"FLID":"F1","v":"new"}"""),
+        )
+        val latest = SchdAggregation.latestPerFlight(pending)
+        assertEquals(2, latest.size)
+        assertEquals("""{"FLID":"F1","v":"new"}""", latest.first { it.contains("F1") })
+        assertEquals("""{"FLID":"F2","v":"only"}""", latest.first { it.contains("F2") })
+    }
+
+    @Test
+    fun `order-independent grouping yields same latest per flight`() {
+        val a = listOf(
+            ev("F1", 1, "old"),
+            ev("F1", 2, "new"),
+        )
+        val b = a.reversed()
+        assertEquals(
+            SchdAggregation.latestPerFlight(a).toSet(),
+            SchdAggregation.latestPerFlight(b).toSet(),
+        )
+    }
+
+    @Test
+    fun `wire shape is FLTR JSON array`() {
+        val payload = SchdAggregation
+            .latestPerFlight(listOf(ev("F1", 1, "a"), ev("F2", 2, "b")))
+            .joinToString(",", "[", "]")
+        assertEquals("[a,b]", payload)
+    }
+}

src/test/kotlin/com/gzzn/omms/msgexchange/nextgen/processing/IdentityTest.kt

@@ -0,0 +1,45 @@
+package com.gzzn.omms.msgexchange.nextgen.processing
+
+import com.gzzn.omms.msgexchange.nextgen.config.PipelineProps
+import com.gzzn.omms.msgexchange.nextgen.domain.DecodedMessage
+import com.gzzn.omms.msgexchange.nextgen.domain.MetaFields
+import com.gzzn.omms.msgexchange.nextgen.domain.MsgKind
+import org.junit.jupiter.api.Test
+import java.time.LocalDate
+import kotlin.test.assertEquals
+
+/**
+ * ACMA-8 I3：identity = SNDR|TYPE|STYP|SEQN；日边界含否集中可配（CONFIRM 矩阵 #11，默认关）。
+ */
+class IdentityTest {
+
+    private fun msg(seqn: Long, dttm: Long = 20260906120000) = DecodedMessage(
+        meta = MetaFields(sndr = "AODB", type = "FLOP", styp = "DELY", seqn = seqn, dttm = dttm),
+        kind = MsgKind.Flop("DELY"),
+        rawXml = "<MSG/>",
+    )
+
+    @Test
+    fun `identity is pipe-joined SNDR TYPE STYP SEQN`() {
+        val identity = Identity.of(msg(42), includeDayBoundary = false)
+        assertEquals("AODB|FLOP|DELY|42", identity)
+    }
+
+    @Test
+    fun `day boundary included only when configured`() {
+        val day = LocalDate.of(2026, 9, 6)
+        assertEquals(
+            "AODB|FLOP|DELY|42|2026-09-06",
+            Identity.of(msg(42), includeDayBoundary = true, day = day),
+        )
+        assertEquals(
+            "AODB|FLOP|DELY|42",
+            Identity.of(msg(42), includeDayBoundary = false, day = day),
+        )
+    }
+
+    @Test
+    fun `props default keeps day boundary off`() {
+        assertEquals(false, PipelineProps.Identity().includeDayBoundary)
+    }
+}