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/util/config.d.ts

@@ -0,0 +1,18 @@
+export declare const config: {
+    readonly databaseUrl: string;
+    readonly workerIntervalMinutes: number;
+    readonly tempDir: string;
+    readonly tdlibStateDir: string;
+    readonly maxZipSizeMB: number;
+    readonly logLevel: "debug" | "info" | "warn" | "error";
+    readonly telegramApiId: number;
+    readonly telegramApiHash: string;
+    /** Maximum jitter added to scheduler interval (in minutes) */
+    readonly jitterMinutes: 5;
+    /** Maximum time span for multipart archive parts (in hours). 0 = no limit. */
+    readonly multipartTimeoutHours: number;
+    /** Delay between Telegram API calls (in ms) to avoid rate limits */
+    readonly apiDelayMs: 1000;
+    /** Max retries for rate-limited requests */
+    readonly maxRetries: 5;
+};