Bridging broken with Dendrite 0.9.6

[tux93]

Describe the bug After updating to Dendrite 0.9.6 matrix-appservice-discord no longer works and is throwing exceptions. Also reported at Dendrite

To Reproduce Steps to reproduce the behavior:

1. Install Dendrite 0.9.6 and DiscordAS 3.0.0
2. Bridge some Rooms
3. Send some messages
4. For every message an exception is logged, no messages are delivered to or from Discord

Expected behavior Messages are sent to and received from Discord

Desktop (please complete the following information):

• OS: openSUSE
• Browser: Firefox
• Version: 104
• DiscordAS 3.0.0
• Dendrite 0.9.6
• node 16

Additional context

Sep 01 22:36:12 node[6098]: Sep-1 22:36:12.721 [DiscordAS] error: Exception thrown while handling "room.event" event TypeError: Cannot read properties of undefined (reading 'age')
Sep 01 22:36:12 node[6098]:     at MatrixEventProcessor.<anonymous> (/home/matrix-discord/matrix-appservice-discord/src/matrixeventprocessor.ts:94:28)
Sep 01 22:36:12 node[6098]:     at Generator.next (<anonymous>)
Sep 01 22:36:12 node[6098]:     at /home/matrix-discord/matrix-appservice-discord/build/src/matrixeventprocessor.js:23:71
Sep 01 22:36:12 node[6098]:     at new Promise (<anonymous>)
Sep 01 22:36:12 node[6098]:     at __awaiter (/home/matrix-discord/matrix-appservice-discord/build/src/matrixeventprocessor.js:19:12)
Sep 01 22:36:12 node[6098]:     at MatrixEventProcessor.OnEvent (/home/matrix-discord/matrix-appservice-discord/build/src/matrixeventprocessor.js:78:16)
Sep 01 22:36:12 node[6098]:     at /home/matrix-discord/matrix-appservice-discord/src/discordas.ts:211:34
Sep 01 22:36:12 node[6098]:     at Generator.next (<anonymous>)
Sep 01 22:36:12 node[6098]:     at fulfilled (/home/matrix-discord/matrix-appservice-discord/build/src/discordas.js:5:58)
Sep 01 22:36:12 node[6098]:     at processTicksAndRejections (node:internal/process/task_queues:96:5)

[Half-Shot]

That sounds like we're relying on the unstable field age.