This PR is [resolving the dispatch part of Coder
Inbocx](https://github.com/coder/internal/issues/403).
Since the DB layer has been merged - we now want to insert notifications
into Coder Inbox in parallel of the other delivery target.
To do so, we push two messages instead of one using the `Enqueue`
method.
This PR aims to close#14253
We keep the default behavior using the Coder logo if there's no logo
set.
Otherwise we want to use the logo based on the URL set in appearance.
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Co-authored-by: defelmnq <yvincent@coder.com>
In investigating https://github.com/coder/internal/issues/109 I noticed many of the notification tests are still using `time.Sleep` and `require.Eventually`. This is an initial effort to start converting these to Quartz.
One product change is to switch the `notifier` to use a `TickerFunc` instead of a normal Ticker, since it allows the test to assert that a batch process is complete via the Quartz `Mock` clock. This does introduce one slight behavioral change in that the notifier waits the fetch interval before processing its first batch. In practice, this is inconsequential: no one will notice if we send notifications immediately on startup, or just a little later.
But, it does make a difference to some tests, which are fixed up here.
