feat: add v2 stack (backend, runner, ui-v2) with release workflow

- backend/: Go API server and runner binaries with PocketBase + MinIO storage
- ui-v2/: SvelteKit frontend rewrite
- docker-compose-new.yml: compose file for the v2 stack
- .gitea/workflows/release-v2.yaml: CI/CD for backend, runner, and ui-v2 Docker Hub images
- scripts/pb-init.sh: migrate from wget to curl, add superuser bootstrap for fresh installs
- .env.example: document DOCKER_BUILDKIT=1 for Colima users

ui-v2/src/routes/api/admin/scrape/+server.ts

@@ -0,0 +1,23 @@
+import { json, error } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import { env } from '$env/dynamic/private';
+
+const SCRAPER_URL = env.SCRAPER_API_URL ?? 'http://localhost:8080';
+
+/**
+ * GET /api/admin/scrape/status
+ * Admin-only proxy to the Go scraper's /api/scrape/status endpoint.
+ */
+export const GET: RequestHandler = async ({ locals }) => {
+	if (!locals.user || locals.user.role !== 'admin') {
+		throw error(403, 'Forbidden');
+	}
+	try {
+		const res = await fetch(`${SCRAPER_URL}/api/scrape/status`);
+		if (!res.ok) return json({ running: false });
+		const data = await res.json();
+		return json({ running: data.running ?? false });
+	} catch {
+		return json({ running: false });
+	}
+};