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/archive/creator.ts

@@ -0,0 +1,21 @@
+/**
+ * Extract a creator name from common archive file naming patterns.
+ *
+ * Priority in the worker: topic name > filename extraction.
+ * This is the fallback when no forum topic name is available.
+ *
+ * Patterns handled (split on ` - `):
+ *   "Mammoth Factory - 2026-01.zip"        → "Mammoth Factory"
+ *   "Artist Name - Pack Title.part01.rar"   → "Artist Name"
+ *   "some_random_file.zip"                  → null
+ */
+export function extractCreatorFromFileName(fileName: string): string | null {
+  // Strip archive extensions (.zip, .rar, .part01.rar, .z01, etc.)
+  const bare = fileName.replace(/(\.(part\d+\.rar|z\d{2}|zip|rar))+$/i, "");
+
+  const idx = bare.indexOf(" - ");
+  if (idx <= 0) return null;
+
+  const creator = bare.slice(0, idx).trim();
+  return creator.length > 0 ? creator : null;
+}