Fix worker getting stuck during sync: add timeouts, stuck detection, and safety limits

- Add invokeWithTimeout wrapper for TDLib API calls (2min timeout per call)
- Add stuck detection to getChannelMessages: break if from_message_id doesn't advance
- Add stuck detection to getTopicMessages: same protection for topic scanning
- Add stuck detection to getForumTopicList: break if pagination offsets don't advance
- Add max page limit (5000) to all scanning loops to prevent infinite pagination
- Add mutex wait timeout (30min) to prevent indefinite blocking when holder hangs
- Add cycle timeout (4h default, configurable via WORKER_CYCLE_TIMEOUT_MINUTES)
- Fix end-of-page detection to use actual limit value instead of hardcoded 100

Co-authored-by: xCyanGrizzly <53275238+xCyanGrizzly@users.noreply.github.com>

worker/dist/preview/match.d.ts

@@ -0,0 +1,22 @@
+export interface TelegramPhoto {
+    id: bigint;
+    date: Date;
+    /** Caption text on the photo message (if any). */
+    caption: string;
+    /** The smallest photo size available — used as thumbnail. */
+    fileId: string;
+    fileSize: number;
+}
+export interface ArchiveRef {
+    baseName: string;
+    firstMessageId: bigint;
+    firstMessageDate: Date;
+}
+/**
+ * Try to match a photo message to an archive by:
+ * 1. Caption contains the archive baseName (without extension)
+ * 2. Photo was posted within ±10 messages (time-window: ±6 hours)
+ *
+ * Returns the best match (closest in time), or null.
+ */
+export declare function matchPreviewToArchive(photos: TelegramPhoto[], archives: ArchiveRef[]): Map<string, TelegramPhoto>;