This adds telemetry events about basic storage consistency, so we can start to
get an idea of how often IndexedDB eviction occurs in the field.
Fixes https://github.com/vector-im/riot-web/issues/9272
This adds a storage consistency check just before creating a client on login.
Each data store we use is checked for data and any problems are logged to the
console.
Fixes https://github.com/vector-im/riot-web/issues/9271