feat: remove legacy alert rules, superseded by automations

Alert rules already auto-migrate into automations on boot and the old
engine stands down after. Deletes the rule/firing tables, routes, UI,
and AI tools; keeps notification channels since automations still use
them. Also fixes automations' notify step, which still called the
deleted repository.

src/ui/locales/translated/id_ID.json

@@ -287,7 +287,6 @@
     "loading": "Memuat...",
     "noData": "Tidak ada data yang tersedia",
     "allClear": "Semuanya aman.",
-    "acknowledgeAlert": "Mengakui",
     "noPingUrls": "Tidak ada URL yang dikonfigurasi",
     "pingLabel": "Label",
     "addPingUrl": "Tambahkan URL",
@@ -324,8 +323,6 @@
     "widgetMetricsChartDesc": "Grafik historis CPU, memori, disk, atau jaringan untuk sebuah host.",
     "widgetHostGridName": "Jaringan Host",
     "widgetHostGridDesc": "Tampilan grid status host SSH",
-    "widgetAlertFeedName": "Umpan Peringatan",
-    "widgetAlertFeedDesc": "Peringatan penembakan langsung dengan dukungan konfirmasi.",
     "widgetPingStatusName": "Status Ping",
     "widgetPingStatusDesc": "Status ping HTTP untuk satu atau lebih URL",
     "widgetRecentActivityName": "Aktivitas Terkini",
@@ -747,7 +744,6 @@
     "portForwarding": "Meneruskan",
     "sftp": "SFTP",
     "connections": "Koneksi",
-    "alerts": "Peringatan",
     "serial": "Serial",
     "keepSideMenuOpen": "Biarkan Menu Tetap Terbuka",
     "collapseSideMenu": "Ciutkan Menu",
@@ -4890,21 +4886,6 @@
     "viewHistory": "Lihat Riwayat"
   },
   "alerts": {
-    "tabFirings": "Peringatan",
-    "tabRules": "Aturan",
-    "tabChannels": "Saluran",
-    "noFirings": "Tidak ada peringatan yang belum diakui",
-    "noRules": "Tidak ada aturan peringatan yang dikonfigurasi.",
-    "noChannels": "Tidak ada saluran notifikasi yang dikonfigurasi.",
-    "rulesDesc": "Aturan peringatan memicu notifikasi.",
-    "channelsDesc": "Di mana notifikasi peringatan dikirim",
-    "acknowledge": "Mengakui",
-    "ackAll": "Akui semuanya",
-    "allAcknowledged": "Semua peringatan telah diterima.",
-    "ackFailed": "Gagal menanggapi peringatan",
-    "ackAllFailed": "Gagal menanggapi semua peringatan",
-    "showAcknowledged": "Tampilkan Semua",
-    "hideAcknowledged": "Sembunyikan Terakui",
     "addChannel": "Tambahkan Saluran",
     "editChannel": "Edit Saluran",
     "channelName": "Nama",
@@ -4917,22 +4898,7 @@
     "ntfyTopic": "Topik",
     "ntfyTopicRequired": "Topik wajib diisi",
     "ntfyToken": "Token Akses (opsional)",
-    "channelSaveFailed": "Gagal menyimpan saluran",
-    "test": "Tes",
-    "testSent": "Notifikasi pengujian telah dikirim.",
-    "testFailed": "Notifikasi pengujian gagal",
-    "testFailedWithReason": "Notifikasi pengujian gagal: {{reason}}",
-    "addRule": "Tambahkan Aturan Peringatan",
-    "editRule": "Edit Aturan Peringatan",
-    "ruleName": "Nama Aturan",
-    "ruleNameRequired": "Nama wajib diisi.",
-    "triggerType": "Pemicu",
-    "thresholdValue": "Ambang batas (%)",
-    "durationSeconds": "Durasi (detik, 0 = tembak segera)",
-    "cooldownMinutes": "Waktu pendinginan (menit)",
-    "channels": "Saluran Pemberitahuan",
-    "noChannelsHint": "Tambahkan saluran di tab Saluran terlebih dahulu.",
-    "ruleSaveFailed": "Gagal menyimpan aturan"
+    "channelSaveFailed": "Gagal menyimpan saluran"
   },
   "ai": {
     "title": "Asisten",