feat: add download detection job with Prowlarr integration

For each series with missing volumes and an approved metadata link,
calls Prowlarr to find available matching releases and stores them in
a report (no auto-download). Includes per-series detail page, Telegram
notifications with per-event toggles, and stats display in the jobs table.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/backoffice/app/(app)/settings/components/TelegramCard.tsx

@@ -17,6 +17,12 @@ export const DEFAULT_EVENTS = {
   metadata_batch_failed: true,
   metadata_refresh_completed: true,
   metadata_refresh_failed: true,
+  reading_status_match_completed: true,
+  reading_status_match_failed: true,
+  reading_status_push_completed: true,
+  reading_status_push_failed: true,
+  download_detection_completed: true,
+  download_detection_failed: true,
 };
 
 export function TelegramCard({ handleUpdateSetting }: { handleUpdateSetting: (key: string, value: unknown) => Promise<void> }) {
@@ -191,6 +197,24 @@ export function TelegramCard({ handleUpdateSetting }: { handleUpdateSetting: (ke
                     { key: "metadata_refresh_failed" as const, label: t("settings.eventRefreshFailed") },
                   ],
                 },
+                {
+                  category: t("settings.eventCategoryReadingStatus"),
+                  icon: "books" as const,
+                  items: [
+                    { key: "reading_status_match_completed" as const, label: t("settings.eventMatchCompleted") },
+                    { key: "reading_status_match_failed" as const, label: t("settings.eventMatchFailed") },
+                    { key: "reading_status_push_completed" as const, label: t("settings.eventPushCompleted") },
+                    { key: "reading_status_push_failed" as const, label: t("settings.eventPushFailed") },
+                  ],
+                },
+                {
+                  category: t("settings.eventCategoryDownloadDetection"),
+                  icon: "download" as const,
+                  items: [
+                    { key: "download_detection_completed" as const, label: t("settings.eventCompleted") },
+                    { key: "download_detection_failed" as const, label: t("settings.eventFailed") },
+                  ],
+                },
               ]).map(({ category, icon, items }) => (
                 <div key={category}>
                   <p className="text-xs font-medium text-muted-foreground uppercase tracking-wide mb-2 flex items-center gap-1.5">