Flaky test: `TestChangingDeviceAfterInviteReEncrypts/{rust_hs1}|{rust_hs1}`

[richvdh]

https://github.com/matrix-org/matrix-rust-sdk/actions/runs/16879018370/job/47810101720?pr=5512

Looks like the back-pagination request produced no results:

client.go:718: [CSAPI] POST hs1/_matrix/client/v3/register => 200 OK (22.110366ms)
      client.go:718: [CSAPI] POST hs1/_matrix/client/v3/register => 200 OK (19.780263ms)
      client.go:718: [CSAPI] POST hs1/_matrix/client/v3/createRoom => 200 OK (105.337965ms)
      rust.go:82: NewRustClient[@user-23-alice:hs1][WCDLCCUEEP] creating...
      rust.go:137: NewRustClient[@user-23-alice:hs1] created client storage=./rust_storage/user-23-alice_hs1_WCDLCCUEEP
      membership_acls_test.go:286: [@user-23-alice:hs1](rust) Login {BaseURL:http://127.0.0.1:32787/ UserID:@user-23-alice:hs1 Password:complement-crypto-password SlidingSyncURL: DeviceID:WCDLCCUEEP PersistentStorage:false ExtraOpts:map[] AccessToken:}
      rust.go:82: NewRustClient[@user-24-bob:hs1][WIOZMEPVIE] creating...
      rust.go:137: NewRustClient[@user-24-bob:hs1] created client storage=./rust_storage/user-24-bob_hs1_WIOZMEPVIE
      membership_acls_test.go:286: [@user-24-bob:hs1](rust) Login {BaseURL:http://127.0.0.1:32787/ UserID:@user-24-bob:hs1 Password:complement-crypto-password SlidingSyncURL: DeviceID:WIOZMEPVIE PersistentStorage:false ExtraOpts:map[] AccessToken:}
      membership_acls_test.go:286: [@user-23-alice:hs1](rust) StartSyncing starting to sync
      membership_acls_test.go:286: [@user-23-alice:hs1](rust) StartSyncing now syncing
      membership_acls_test.go:286: [@user-24-bob:hs1](rust) StartSyncing starting to sync
      membership_acls_test.go:286: [@user-24-bob:hs1](rust) StartSyncing now syncing
      client.go:718: [CSAPI] POST hs1/_matrix/client/v3/rooms/!FauKFeEayyQkhYRNyt:hs1/invite => 200 OK (48.228592ms)
      membership_acls_test.go:291: [@user-23-alice:hs1](rust) SendMessage !FauKFeEayyQkhYRNyt:hs1 => Alice should re-encrypt this message for bob's new device
      membership_acls_test.go:291: [@user-23-alice:hs1]AddTimelineListener[!FauKFeEayyQkhYRNyt:hs1]
      rust.go:795: [@user-23-alice:hs1]AddTimelineListener[!FauKFeEayyQkhYRNyt:hs1] TimelineDiff len=1
      rust.go:863: [@user-23-alice:hs1]TimelineDiff change: <nil>
      rust.go:863: [@user-23-alice:hs1]TimelineDiff change: &{ID:$kUGY00DCvWq3WHbQU5CBGRYz2XArpew_1o8AK3YhfZQ Text: Sender:@user-23-alice:hs1 Target: Membership: FailedToDecrypt:false}
      rust.go:863: [@user-23-alice:hs1]TimelineDiff change: &{ID:$BsaxmVxB7IVNl49BOnIY1tOAXVPTcyAduWe06FSzYsw Text: Sender:@user-23-alice:hs1 Target:@user-24-bob:hs1 Membership:invite FailedToDecrypt:false}
      membership_acls_test.go:291: [@user-23-alice:hs1]AddTimelineListener[!FauKFeEayyQkhYRNyt:hs1] set up
      rust.go:795: [@user-23-alice:hs1]AddTimelineListener[!FauKFeEayyQkhYRNyt:hs1] TimelineDiff len=1
      rust.go:863: [@user-23-alice:hs1]TimelineDiff change: &{ID: Text:Alice should re-encrypt this message for bob's new device Sender:@user-23-alice:hs1 Target: Membership: FailedToDecrypt:false}
      rust.go:795: [@user-23-alice:hs1]AddTimelineListener[!FauKFeEayyQkhYRNyt:hs1] TimelineDiff len=1
      rust.go:863: [@user-23-alice:hs1]TimelineDiff change: &{ID:$5xIIkGQPLTqomeXKCrYE8q9DSKYrjWsGe54LMpIERyw Text:Alice should re-encrypt this message for bob's new device Sender:@user-23-alice:hs1 Target: Membership: FailedToDecrypt:false}
      membership_acls_test.go:291: [@user-23-alice:hs1](rust) SendMessage !FauKFeEayyQkhYRNyt:hs1 => $5xIIkGQPLTqomeXKCrYE8q9DSKYrjWsGe54LMpIERyw %!s(<nil>)
      client.go:718: [CSAPI] POST hs1/_matrix/client/v3/login => 200 OK (13.056524ms)
      rust.go:82: NewRustClient[@user-24-bob:hs1][NEW_DEVICE] creating...
      rust.go:795: [@user-23-alice:hs1]AddTimelineListener[!FauKFeEayyQkhYRNyt:hs1] TimelineDiff len=2
      rust.go:863: [@user-23-alice:hs1]TimelineDiff change: &{ID:$5xIIkGQPLTqomeXKCrYE8q9DSKYrjWsGe54LMpIERyw Text:Alice should re-encrypt this message for bob's new device Sender:@user-23-alice:hs1 Target: Membership: FailedToDecrypt:false}
      rust.go:137: NewRustClient[@user-24-bob:hs1] created client storage=./rust_storage/user-24-bob_hs1_NEW_DEVICE
      membership_acls_test.go:295: [@user-24-bob:hs1](rust) Login {BaseURL:http://127.0.0.1:32787/ UserID:@user-24-bob:hs1 Password:complement-crypto-password SlidingSyncURL: DeviceID:NEW_DEVICE PersistentStorage:false ExtraOpts:map[] AccessToken:}
      membership_acls_test.go:295: [@user-24-bob:hs1](rust) StartSyncing starting to sync
      membership_acls_test.go:295: [@user-24-bob:hs1](rust) StartSyncing now syncing
      client.go:718: [CSAPI] POST hs1/_matrix/client/v3/join/!FauKFeEayyQkhYRNyt:hs1 => 200 OK (38.130171ms)
      rust.go:795: [@user-23-alice:hs1]AddTimelineListener[!FauKFeEayyQkhYRNyt:hs1] TimelineDiff len=1
      rust.go:863: [@user-23-alice:hs1]TimelineDiff change: &{ID:$EYicfIxaTsO7lWagtZ1qjcdReeLz11fDSFJoCUbZkgs Text: Sender:@user-24-bob:hs1 Target:@user-24-bob:hs1 Membership:join FailedToDecrypt:false}
      membership_acls_test.go:302: [@user-24-bob:hs1](rust) Backpaginate 5 !FauKFeEayyQkhYRNyt:hs1
      membership_acls_test.go:302: [@user-24-bob:hs1](rust) Backpaginate 5 !FauKFeEayyQkhYRNyt:hs1 => %!s(<nil>)
      membership_acls_test.go:303: [@user-24-bob:hs1](rust) GetEvent(!FauKFeEayyQkhYRNyt:hs1, $5xIIkGQPLTqomeXKCrYE8q9DSKYrjWsGe54LMpIERyw)
      membership_acls_test.go:303: MustGetEvent: failed to GetEventTimelineItemByEventId($5xIIkGQPLTqomeXKCrYE8q9DSKYrjWsGe54LMpIERyw): ClientError: Generic: Msg=Item with given event ID not found, Details=0xc000e78c90
      rust.go:519: @user-24-bob:hs1: Stopping sync service
      panic.go:635: [@user-24-bob:hs1](rust) Close
      rust.go:519: @user-24-bob:hs1: Stopping sync service
      rust.go:519: @user-23-alice:hs1: Stopping sync service
      panic.go:635: [@user-24-bob:hs1](rust) Close
      panic.go:635: [@user-23-alice:hs1](rust) Close