fix(prospecting): fix scan-jobs batch endpoints and add job tracking

- Reorder routes: batch endpoints before /{prospect_id} to fix FastAPI
  route matching (was parsing "batch" as prospect_id → 422)
- Add scan job tracking via stats_service.create_job/complete_job so
  the scan-jobs table gets populated after each batch run
- Add contact scrape batch endpoint (POST /contacts/batch) with
  get_pending_contact_scrape query
- Fix scan-jobs.js: explicit route map instead of naive replace
- Normalize domain_name on create/update (strip protocol, www, slash)
- Add domain_name to ProspectUpdate schema
- Add proposal for contact scraper enum + regex fixes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/prospecting/static/admin/js/scan-jobs.js

@@ -52,6 +52,7 @@ function scanJobs() {
             'http_check': 'http-check',
             'tech_scan': 'tech-scan',
             'performance_scan': 'performance',
+            'contact_scrape': 'contacts',
             'score_compute': 'score-compute',
         },