feat(seo): index public online pages without confirmation

Drop the user_confirmed_at gate so public, online, unexpired pages can enter sitemap/llms and receive SEO/GEO tags. Defaults now enable all discovery switches; stored all-off config is still preserved until admin saves.

Co-authored-by: Cursor <cursoragent@cursor.com>

mindspace-seo-discovery-service.mjs

@@ -32,7 +32,6 @@ export async function listIndexablePublications(
      LEFT JOIN h5_page_records p ON p.id = pr.page_id
      WHERE pr.status = 'online'
        AND pr.access_mode = 'public'
-       AND pr.user_confirmed_at IS NOT NULL
        AND (pr.expires_at IS NULL OR pr.expires_at > ?)
      ORDER BY pr.published_at DESC
      LIMIT ? OFFSET ?`,
@@ -153,7 +152,7 @@ export function renderRobotsTxt({
 export function renderLlmsTxt(entries, { origin = '' } = {}) {
   const header = [
     '# TKMind MindSpace public pages',
-    '# Only confirmed public publications are listed here.',
+    '# Public online publications are listed here.',
     '',
   ];
   const body = entries