fix(prospecting): add missing /prospecting prefix and fix broken template macros

The API router was missing prefix="/prospecting", causing all endpoints to
register at /api/v1/admin/stats instead of /api/v1/admin/prospecting/stats.

Also fix 500 errors on prospects, leads, and scan-jobs pages caused by
importing non-existent macro names (table_empty → table_empty_state,
pagination_controls → pagination).

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

app/modules/prospecting/templates/prospecting/admin/scan-jobs.html

@@ -1,7 +1,7 @@
 {% extends "admin/base.html" %}
 {% from 'shared/macros/headers.html' import page_header %}
 {% from 'shared/macros/alerts.html' import loading_state, error_state %}
-{% from 'shared/macros/pagination.html' import pagination_controls %}
+{% from 'shared/macros/pagination.html' import pagination %}
 
 {% block title %}Scan Jobs{% endblock %}
 
@@ -86,7 +86,7 @@
     </div>
 </div>
 
-{{ pagination_controls() }}
+{{ pagination() }}
 {% endblock %}
 
 {% block extra_scripts %}