Timeline: introduce origin on timeline items

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/item/event/EventTimelineItem.kt

@@ -34,6 +34,7 @@ data class EventTimelineItem(
     val timestamp: Long,
     val content: EventContent,
     val debugInfo: TimelineItemDebugInfo,
+    val origin: TimelineItemEventOrigin?,
 ) {
     fun inReplyTo(): InReplyTo? {
         return (content as? MessageContent)?.inReplyTo

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/timeline/item/event/TimelineItemEventOrigin.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.element.android.libraries.matrix.api.timeline.item.event
+
+enum class TimelineItemEventOrigin {
+    LOCAL, SYNC, PAGINATION;
+}