Sliding Sync: Make sure we get up-to-date information from `get_sliding_sync_rooms_for_user(...)` (#17692)

We need to bust the `get_sliding_sync_rooms_for_user`
cache when the room encryption is updated and any
other field that is used in the query.

Follow-up to https://github.com/element-hq/synapse/pull/17630

- Bust cache for membership change (cross-reference
`get_rooms_for_user`)
- Bust cache for room `encryption` (cross-reference
`get_room_encryption`)
- Bust cache for `forgotten` (cross-reference
`did_forget`/`get_forgotten_rooms_for_user`)

1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py

index d6deb077c8..e14d711c76 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -136,6 +136,7 @@ class SQLBaseStore(metaclass=ABCMeta):
         self._attempt_to_invalidate_cache("get_partial_current_state_ids", (room_id,))
         self._attempt_to_invalidate_cache("get_room_type", (room_id,))
         self._attempt_to_invalidate_cache("get_room_encryption", (room_id,))
+        self._attempt_to_invalidate_cache("get_sliding_sync_rooms_for_user", None)
 
     def _invalidate_state_caches_all(self, room_id: str) -> None:
         """Invalidates caches that are based on the current state, but does