feat(processing): 领域/投影/终态三步提交与 FlightProjectionPort（ACM2-79）

PIPELINE_LOCK 跨 Redis 写；MSG_EVENT HELD→PENDING；Redis 失败不终态不投递；V3 迁移。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/test/kotlin/com/gzzn/omms/msgexchange/processing/TestFlightCommit.kt

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+package com.gzzn.omms.msgexchange.processing
+
+import com.gzzn.omms.msgexchange.infra.persistence.MsgEventRepository
+import com.gzzn.omms.msgexchange.infra.persistence.PipelineLockRepository
+import com.gzzn.omms.msgexchange.infra.persistence.PipelineTransactionManager
+import com.gzzn.omms.msgexchange.infra.persistence.ProcStateRepository
+import com.gzzn.omms.msgexchange.infra.stub.StubFlightProjectionPort
+import com.gzzn.omms.msgexchange.infra.stub.StubMsgEvents
+import com.gzzn.omms.msgexchange.infra.stub.StubPipelineLock
+import com.gzzn.omms.msgexchange.infra.stub.StubPipelineTx
+import com.gzzn.omms.msgexchange.infra.stub.StubProcState
+import java.time.Clock
+
+/**
+ * 处理器用例共用的三步提交装配：默认全内存、投影不失败。
+ * 事件仓储要和处理器用同一个实例，否则放行（`HELD` → `PENDING`）落不到处理器写的那些行上。
+ */
+internal fun testCommit(
+    procState: ProcStateRepository = StubProcState(),
+    msgEvents: MsgEventRepository = StubMsgEvents(),
+    projection: FlightProjectionPort = StubFlightProjectionPort(),
+    lock: PipelineLockRepository = StubPipelineLock(),
+    txManager: PipelineTransactionManager = StubPipelineTx(),
+    clock: Clock = Clock.systemUTC(),
+) = FlightCommit(txManager, lock, procState, msgEvents, projection, clock)