feat: add Telegram integration with forum topic support and creator tracking

Adds full Telegram ZIP ingestion pipeline: TDLib worker service scans source
channels for archive files, deduplicates by content hash, extracts metadata,
uploads to archive channel, and indexes in Postgres. Forum supergroups are
scanned per-topic with topic names used as creator. Filename-based creator
extraction (e.g. "Mammoth Factory - 2026-01.zip") serves as fallback.

Includes admin UI for managing accounts/channels, simplified account setup
(API credentials via env vars), auth code/password submission dialog,
package browser with creator column, and live ingestion activity tracking.

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

worker/src/util/logger.ts

@@ -0,0 +1,14 @@
+import pino from "pino";
+import { config } from "./config.js";
+
+export const logger = pino({
+  level: config.logLevel,
+  transport:
+    config.logLevel === "debug"
+      ? { target: "pino/file", options: { destination: 1 } }
+      : undefined,
+});
+
+export function childLogger(name: string, extra?: Record<string, unknown>) {
+  return logger.child({ module: name, ...extra });
+}