fix: upgrade matrix-js-sdk 38.2.0 -> 41.5.0 with API compat fixes

- sessionMembershipsForRoom() removed in v41 (was synchronous, static)
- Replacement: read session.memberships directly (always up-to-date, sync)
  - useCall.ts: useCallMembers reads session.memberships
  - useCallEmbed.ts: createCallEmbed reads rtcSession.memberships
  - CallEmbedProvider.tsx: inline check on session.memberships
- Remove unused MatrixRTCSession import from CallEmbedProvider
- clearLoginData: also unregisters service workers and clears SW caches

src/app/hooks/useCall.ts

@@ -35,12 +35,12 @@ export const useCallSession = (room: Room): MatrixRTCSession => {
 
 export const useCallMembers = (room: Room, session: MatrixRTCSession): CallMembership[] => {
   const [memberships, setMemberships] = useState<CallMembership[]>(
-    MatrixRTCSession.sessionMembershipsForRoom(room, session.sessionDescription),
+    session.memberships,
   );
 
   useEffect(() => {
     const updateMemberships = () => {
-      setMemberships(MatrixRTCSession.sessionMembershipsForRoom(room, session.sessionDescription));
+      setMemberships([...session.memberships]);
     };
 
     updateMemberships();