feat(telegram): add "skip & disable topic" on the live worker panel

Track the forum topic currently being processed on IngestionRun
(currentTopicId + currentAccountChannelMapId; additive migration) and
expose it on the live status. processArchiveSets gains an optional
shouldStop callback polled before each archive set; the forum branch
passes a live isTopicFetchEnabled check, so disabling a topic mid-run
lets the in-flight file finish, then skips the rest of that topic.

A new disableActiveTopic server action sets the topic's fetchEnabled
false (upsert), and the worker status panel shows a "Skip & disable
this topic" button while a topic is being processed. Future runs skip
the topic via the existing live per-topic read.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

worker/src/db/queries.ts

@@ -369,6 +369,8 @@ export interface ActivityUpdate {
   downloadedBytes?: bigint | null;
   totalBytes?: bigint | null;
   downloadPercent?: number | null;
+  currentTopicId?: bigint | null;
+  currentAccountChannelMapId?: string | null;
   messagesScanned?: number;
   zipsFound?: number;
   zipsDuplicate?: number;
@@ -396,6 +398,10 @@ export async function updateRunActivity(
       ...(activity.zipsFound !== undefined && { zipsFound: activity.zipsFound }),
       ...(activity.zipsDuplicate !== undefined && { zipsDuplicate: activity.zipsDuplicate }),
       ...(activity.zipsIngested !== undefined && { zipsIngested: activity.zipsIngested }),
+      ...(activity.currentTopicId !== undefined && { currentTopicId: activity.currentTopicId }),
+      ...(activity.currentAccountChannelMapId !== undefined && {
+        currentAccountChannelMapId: activity.currentAccountChannelMapId,
+      }),
     },
   });
 }
@@ -410,6 +416,8 @@ const CLEAR_ACTIVITY = {
   downloadedBytes: null,
   totalBytes: null,
   downloadPercent: null,
+  currentTopicId: null,
+  currentAccountChannelMapId: null,
   lastActivityAt: new Date(),
 };