Resume paused scrapes from their cursor

poc/src/media.ts

@@ -384,6 +384,28 @@ export class MediaService {
         this.engine.stop(id);
     }
 
+    /** Continue a paused scrape from its cursor with the same backend family. */
+    async resumeScrape(scrapeId: string): Promise<ScrapeMeta | null> {
+        const meta = this.engine.get(scrapeId);
+        if (!meta) return null;
+
+        let backend: ScrapeBackend;
+        if (meta.backend === "slopbot" && meta.guildId) {
+            const available = await this.ensureSlopbot();
+            const inGuild = this.bot?.guilds.cache.has(meta.guildId) ?? false;
+            const fetcher = this.botFetcher;
+            if (!available || !inGuild || !fetcher) {
+                throw new Error("slopbot is not connected to that guild");
+            }
+            backend = new SlopbotBackend(fetcher);
+        } else {
+            backend = this.puppetBackend();
+        }
+
+        this.deps.log?.(`resuming scrape ${scrapeId} from cursor ${meta.cursor ?? "start"}`);
+        return this.engine.resume(scrapeId, backend);
+    }
+
     listScrapes(): ScrapeMeta[] {
         return this.engine.list();
     }