LocalAccountDelegate's `refreshAll` doesn't complete

[stuartbreckenridge]

	@MainActor func refreshAll(for account: Account) async throws {
		guard refreshProgress.isComplete, !Platform.isRunningUnitTests else {
			return
		}

		let feeds = account.flattenedFeeds()
		await refresher.refreshFeeds(feeds)
		account.metadata.lastArticleFetchEndTime = Date()
	}

In the above code, await refresher.refreshFeeds(feeds) is called but there's an underlying completion handler that doesn't appear to have been implemented. As a result, account.metadata.lastArticleFetchEndTime is never written to.