* Don't proactively cache event types and state keys when we don't know if the transaction has persisted yet
* Remove event type and state key caches altogether
* Add RoomInfo cache, remove RoomServerRoomNID cache, ensure caches are thread-safe
* Don't panic if the roomInfo isn't known yet
* LRU package is already threadsafe
* Use RoomInfo cache to find room version if possible in Events()
* Adding comments about RoomInfoCache safety
* Initial work on roomserver NID caches
* Give caches to roomserver storage
* Populate caches
* Fix bugs
* Fix WASM build
* Don't hit cache twice in RoomNIDExcludingStubs
* Store reverse room ID-room NID mapping, consult caches when assigning NIDs
