Add medboom.ir as an ingestion source (doctor/dentist-heavy, VPN-free)

New MedboomListingSource: a WordPress medical-classifieds board crawled like medjobs
(wp-sitemap.xml -> posts-post-N.xml, newest first), filtered to clinical-role slugs and
Tehran-only for launch. medboom skews toward doctors/dentists/pharmacists and carries both
hiring and availability posts, so it directly broadens the role mix the nurse-heavy Divar
content lacks. Iranian-hosted -> no proxy/VPN needed (relevant now that Telegram is off).

Wired like the other sources: AppSetting toggles (MedboomEnabled/MaxAds/UseProxy) + EF
migration, SettingsService persistence, admin Settings UI, DI registration. Off by default.
Validated against live data: Tehran clinical ads at named clinics (pharmacy/dental/etc.).

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

src/JobsMedical.Web/Models/AppSetting.cs

@@ -87,6 +87,12 @@ public class AppSetting
     public int IranEstekhdamMaxAds { get; set; } = 40;
     public bool IranEstekhdamUseProxy { get; set; } = false;
 
+    /// <summary>Scrape medboom.ir clinical ads (WordPress board; doctor/dentist-heavy, hiring +
+    /// availability; crawled via its WP sitemap, Tehran-only for launch).</summary>
+    public bool MedboomEnabled { get; set; } = false;
+    public int MedboomMaxAds { get; set; } = 40;
+    public bool MedboomUseProxy { get; set; } = false;
+
     // --- SMS OTP (Kavenegar). When off, the code is shown on screen (dev only). ---
     public bool SmsEnabled { get; set; } = false;
     [MaxLength(200)] public string? SmsApiKey { get; set; }