fix(delivery): claimBatch 排除已暂停 FLID，避免投递饿死（ACM2-95）

同 FLID 事件占满 delivery-batch 时后续轮次不再重复领到同一批；补饥饿回归用例。

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

src/test/kotlin/com/gzzn/omms/msgexchange/delivery/DispatcherTickTest.kt

@@ -247,6 +247,34 @@ class DispatcherTickTest {
         assertTrue(f1Rows.all { it.state == EventStatus.PENDING })
     }
 
+    /** 暂停 FLID 事件数 ≥ delivery-batch 时，领批排除已暂停键，其他航班同轮仍可发（ACM2-95）。 */
+    @Test
+    fun `paused FLID filling the claim batch does not starve other flights`() {
+        val repo = StubMsgEvents()
+        val port = FailingMsgKeyPort("F1")
+        val props = PipelineProps().apply {
+            pipeline.deliveryBatch = 3
+            pipeline.deliveryDrainRounds = 5
+            schd.flushPeriod = java.time.Duration.ofHours(1)
+        }
+        val d = dispatcher(repo, port, props)
+        // F1 三条占满 batch=3；F2 一条排在后面——旧实现会整轮领到同一批 F1 并 sent=0
+        repo.insertAll(
+            listOf(
+                ev(1, Targets.KAFKA_MSG, "F1", """{"flid":"F1","v":1}"""),
+                ev(2, Targets.KAFKA_MSG, "F1", """{"flid":"F1","v":2}"""),
+                ev(3, Targets.KAFKA_MSG, "F1", """{"flid":"F1","v":3}"""),
+                ev(4, Targets.KAFKA_MSG, "F2", """{"flid":"F2","v":1}"""),
+            ),
+        )
+
+        d.tick()
+
+        assertEquals(1, port.sent.count { it.topic == "msg" && it.key == "F2" })
+        assertEquals(0, port.sent.count { it.topic == "msg" && it.key == "F1" })
+        assertTrue(repo.rows.values.filter { it.partitionKey == "F1" }.all { it.state == EventStatus.PENDING })
+    }
+
     @Test
     fun `msg head backoff not yet due pauses only the same FLID`() {
         val repo = StubMsgEvents()