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>

src/app/api/ingestion/status/route.ts

@@ -0,0 +1,13 @@
+import { NextResponse } from "next/server";
+import { authenticateApiRequest } from "@/lib/telegram/api-auth";
+import { getIngestionStatus } from "@/lib/telegram/queries";
+
+export const dynamic = "force-dynamic";
+
+export async function GET(request: Request) {
+  const authResult = await authenticateApiRequest(request);
+  if ("error" in authResult) return authResult.error;
+
+  const accounts = await getIngestionStatus();
+  return NextResponse.json({ accounts });
+}