feat: deferred dispatch, release-check provider, settings polish

- Defer quiet-hours dispatches into new deferred_dispatch table; drain
  job + periodic catch-up scan re-fire at window end with coalescing on
  (link, event_type, collection_id).
- Add ON DELETE SET NULL migration on event_log_id and partial unique
  index on (link_id, collection_id, event_type) WHERE status='pending'.
- Add release-check provider abstraction (Gitea/GitHub) with SSRF-safe
  URL validation, settings UI cassette, and scheduled polling.
- Replace importlib-only version lookup with version.py helper that
  prefers the higher of installed metadata vs source pyproject so stale
  editable dev installs stop misreporting.
- Aurora frontend polish: MetaStrip component, ReleaseCassette,
  EventDetailModal expansion, and i18n additions.

frontend/src/routes/bots/EmailBotTab.svelte

@@ -13,6 +13,7 @@
 	import { snackSuccess, snackError } from '$lib/stores/snackbar.svelte';
 	import Button from '$lib/components/Button.svelte';
 	import ErrorBanner from '$lib/components/ErrorBanner.svelte';
+	import MetaStrip, { type MetaTile } from '$lib/components/MetaStrip.svelte';
 	import type { EmailBot } from '$lib/types';
 
 	let { onreload }: { onreload: () => Promise<void> } = $props();
@@ -39,6 +40,30 @@
 		}
 	});
 
+	function emailBotTiles(bot: EmailBot): MetaTile[] {
+		const tiles: MetaTile[] = [];
+		tiles.push({
+			icon: 'mdiEmailOutline',
+			label: bot.email,
+			tone: 'lavender',
+			mono: true,
+		});
+		tiles.push({
+			icon: 'mdiServerNetwork',
+			label: `${bot.smtp_host}:${bot.smtp_port}`,
+			tone: 'sky',
+			mono: true,
+		});
+		if (bot.smtp_use_tls) {
+			tiles.push({
+				icon: 'mdiLockOutline',
+				label: 'TLS',
+				tone: 'mint',
+			});
+		}
+		return tiles;
+	}
+
 	function openNewEmail() { emailForm = defaultEmailForm(); nameManuallyEdited = false; editingEmail = null; showEmailForm = true; }
 	function editEmailBot(bot: EmailBot) {
 		emailForm = {
@@ -165,16 +190,16 @@
 		<EmptyState icon="mdiEmailOutline" message={t('emailBot.noBots')} />
 	</Card>
 {:else}
-	<div class="space-y-3 stagger-children">
+	<div class="list-stack stagger-children">
 		{#each emailBots as bot}
 			<Card hover entityId={bot.id}>
-				<div class="flex items-center justify-between">
-					<div>
-						<div class="flex items-center gap-2">
-							<span style="color: var(--color-primary);"><MdiIcon name={bot.icon || 'mdiEmailOutline'} size={20} /></span>
-							<p class="font-medium">{bot.name}</p>
+				<div class="list-row">
+					<div class="list-row__identity">
+						<div class="flex items-center gap-2 min-w-0">
+							<span style="color: var(--color-primary);" class="shrink-0"><MdiIcon name={bot.icon || 'mdiEmailOutline'} size={20} /></span>
+							<p class="font-medium truncate">{bot.name}</p>
 						</div>
-						<div class="flex items-center gap-2 mt-1 flex-wrap">
+						<div class="flex items-center gap-2 mt-1 flex-wrap list-row__secondary">
 							<span class="text-xs text-[var(--color-muted-foreground)] font-mono">{bot.email}</span>
 							<span class="text-xs px-1.5 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{bot.smtp_host}:{bot.smtp_port}</span>
 							{#if bot.smtp_use_tls}
@@ -182,7 +207,8 @@
 							{/if}
 						</div>
 					</div>
-					<div class="flex items-center gap-1">
+					<MetaStrip tiles={emailBotTiles(bot)} />
+					<div class="list-row__actions">
 						<IconButton icon="mdiSend" title={t('emailBot.testConnection')} onclick={() => testEmailBot(bot.id)} disabled={emailTesting[bot.id]} />
 						<IconButton icon="mdiPencil" title={t('common.edit')} onclick={() => editEmailBot(bot)} />
 						<IconButton icon="mdiDelete" title={t('common.delete')} onclick={() => removeEmail(bot.id)} variant="danger" />