Add medjobs.ir scraper + employer/employee choice at signup

- MedjobsListingSource: crawls medjobs.ir sitemaps (ad_listing-sitemapN) → fetches ad pages → title+description → engine (dedupe/parse/validate/publish as SEO job pages). Configured in /Admin/Settings (enable + max ads/run).
- Login/register now asks 'کادر درمان' vs 'کارفرما/مرکز': new accounts get Doctor vs FacilityAdmin role; post-login routes to /Me, /Employer, or /Admin accordingly.
- Verified live: medjobs run fetched real ads into the review queue; employer signup → /Employer.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/JobsMedical.Web/wwwroot/css/site.css

@@ -189,6 +189,15 @@ label { font-size: 13px; }
 .alert { padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; font-weight: 600; }
 .alert-success { background: var(--primary-soft); color: var(--primary-dark); }
 
+/* account-type chooser on login */
+.acct-toggle { display: flex; gap: 10px; }
+.acct-opt { flex: 1; display: block; cursor: pointer; }
+.acct-opt input { position: absolute; opacity: 0; }
+.acct-opt span { display: block; text-align: center; padding: 12px 8px; border: 1.5px solid var(--line);
+  border-radius: 12px; font-weight: 700; font-size: 14px; transition: all .15s; }
+.acct-opt span small { font-weight: 400; color: var(--muted); font-size: 11px; }
+.acct-opt input:checked + span { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); }
+
 /* hour-range timeline bar */
 .hourbar-wrap { direction: ltr; margin: 6px 0 2px; }
 .hourbar {