fix: Increase SEO audit rate limit from 10/hour to 200/hour

Batch SEO audit was stopping after 10 companies due to
restrictive rate limit. Increased to 200/hour to allow
full batch processing of all companies.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -4372,7 +4372,7 @@ def api_seo_audit_by_slug(slug):
 
 @app.route('/api/seo/audit', methods=['POST'])
 @login_required
-@limiter.limit("10 per hour")
+@limiter.limit("200 per hour")
 def api_seo_audit_trigger():
     """
     API: Trigger SEO audit for a company (admin-only).