fix(delivery): 删除通知只登记 KAFKA:msg，schd 不再发 tombstone（ACM2-87）

- FdelProcessor 移除 schd TOMBSTONE，仅保留 msg 删除通知（C-9）
- HistorySweepJob 补发的清退通知由 schd TOMBSTONE 改为 msg 删除通知
- msg value 形态沿用现状（deleted:true JSON），待 Q5 定稿不改成 null tombstone
- 同步修订 FdelAndAdftProcessorTest / HistorySweepJobTest / HistorySweepPurgePgTest 断言

src/main/kotlin/com/gzzn/omms/msgexchange/processing/DynamicProcessors.kt

@@ -86,20 +86,8 @@ class FdelProcessor(
             val createdAt = clock.instant()
             msgEvents.insertAll(
                 listOf(
-                    MsgEvent(
-                        target = Targets.KAFKA_SCHD,
-                        partitionKey = payload.flid,
-                        eventType = EventType.TOMBSTONE,
-                        stateVersion = current?.stateVersion ?: 0L,
-                        payloadJson = mapper.writeValueAsString(
-                            mapOf(
-                                "flid" to payload.flid,
-                                "stateVersion" to (current?.stateVersion ?: 0L),
-                                "deleted" to true,
-                            ),
-                        ),
-                        createdAt = createdAt,
-                    ),
+                    // C-9：删除通知只走 KAFKA:msg，schd 不再发 tombstone；
+                    // value 形态（"deleted":true 的 JSON）沿用现状，待 Q5 定稿
                     MsgEvent(
                         target = Targets.KAFKA_MSG,
                         partitionKey = payload.flid,