sync: SEO canonical URLs, curation improvements, batch scripts, stats fix

- Dynamic canonical URLs and alternates for all pages (SEO fix)
- Shared seo.ts utility for canonical path generation
- Improved duplicate detection: standalone > aggregator priority, forks/created_at tie-breakers
- browseReadyFilter now includes unique aggregator skills
- Stats aligned with browseReadyFilter (was showing 16k instead of 62k+)
- Re-review mechanism: content_hash changes trigger needs-re-review
- review_status field added to skills schema
- Batch security scan and quality score scripts
- Indexer Dockerfile updated for curation deps
- Removed roadmap from README

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/app/[locale]/browse/page.tsx

@@ -5,6 +5,8 @@ import { createDb, skillQueries, categoryQueries } from '@skillhub/db';
 import { BrowseFilters, SearchBar, Pagination, ActiveFilters, EmptyState } from '@/components/BrowseFilters';
 import { SkillCard } from '@/components/SkillCard';
 import { toPersianNumber } from '@/lib/format-number';
+import { getPageAlternates } from '@/lib/seo';
+
 
 // Force dynamic rendering to fetch fresh data from database
 export const dynamic = 'force-dynamic';
@@ -79,6 +81,18 @@ async function getSkills(params: {
   }
 }
 
+
+export async function generateMetadata({
+  params,
+}: {
+  params: Promise<{ locale: string }>;
+}) {
+  const { locale } = await params;
+  return {
+    alternates: getPageAlternates(locale, '/browse'),
+  };
+}
+
 export default async function BrowsePage({ params, searchParams }: BrowsePageProps) {
   const { locale } = await params;
   setRequestLocale(locale);