The server was calling exit() immediately when a room didn't exist,
which caused the SSE connection to open and then close right away.
This triggered EventSource to reconnect in a loop.
Now the server keeps the connection open and sends keepalives even
for rooms that don't exist yet. This is the correct SSE behavior -
maintain the connection and stream data when it becomes available.
Fixes the "connection established then immediately errors" issue
seen in diagnostic tests.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Josh Knapp
9feb17b734