docs(indexeddb): add license to event_cache_store::types file

Signed-off-by: Michael Goldenberg <m@mgoldenberg.net>

crates/matrix-sdk-indexeddb/src/event_cache_store/serializer/types.rs

@@ -173,6 +173,12 @@ pub enum IndexedNextChunkIdKey {
     Some(IndexedChunkIdKey),
 }
 
+impl IndexedNextChunkIdKey {
+    pub fn none(room_id: IndexedRoomId) -> Self {
+        Self::None((room_id,))
+    }
+}
+
 impl IndexedKey<Chunk> for IndexedNextChunkIdKey {
     type KeyComponents = Option<ChunkIdentifier>;
 

crates/matrix-sdk-indexeddb/src/event_cache_store/types.rs

@@ -1,3 +1,17 @@
+// Copyright 2025 The Matrix.org Foundation C.I.C.
+//
+// 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
+
 use matrix_sdk_base::{
     deserialized_responses::TimelineEvent, event_cache::store::extract_event_relation,
     linked_chunk::ChunkIdentifier,