Strip «آماده به کار» from role names + reject domestic-helper ads

Re-check of live applicants found two gaps:
- «کمک بهیار آماده به کار» — the availability phrase glued onto the role. StripRoleModifiers
  now removes «آماده به کار / آماده همکاری / جویای کار / جهت همکاری» phrases before
  token-stripping, so the role collapses to «کمک بهیار».
- «خانم امورسبک منزل» — light-housework domestic helpers (not کادر درمان). Validator
  now discards ads with «امور منزل / نظافت منزل / خدمتکار / مستخدم …» markers.

Both take effect for existing data on the next applicant reprocess.

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

src/JobsMedical.Web/Services/Scraping/IngestionService.cs

@@ -610,11 +610,18 @@ public class IngestionService
     private static readonly string[] RoleModifierWords =
         { "آقا", "خانم", "خانوم", "بانو", "مرد", "زن", "کارآموز", "کارورز", "ارشد", "مبتدی" };
 
-    /// <summary>Remove modifier tokens from a role name, keeping the base profession. Never strips to
-    /// empty (falls back to the original).</summary>
+    // Availability phrases that the model sometimes glues onto the role («کمک بهیار آماده به کار»);
+    // removed as whole substrings before token-stripping (so «به»/«کار» tokens stay safe elsewhere).
+    private static readonly string[] RolePhraseNoise =
+        { "آماده به کار", "آماده همکاری", "آماده بکار", "آماده به همکاری", "جویای کار", "دنبال کار", "جهت همکاری" };
+
+    /// <summary>Remove availability phrases + gender/seniority tokens from a role name, keeping the
+    /// base profession. Never strips to empty (falls back to the original).</summary>
     private static string StripRoleModifiers(string name)
     {
-        var kept = NormalizeFa(name).Split(' ', StringSplitOptions.RemoveEmptyEntries)
+        var n = NormalizeFa(name);
+        foreach (var p in RolePhraseNoise) n = n.Replace(NormalizeFa(p), " ");
+        var kept = n.Split(' ', StringSplitOptions.RemoveEmptyEntries)
             .Where(t => !RoleModifierWords.Any(m => NormalizeFa(m) == t)).ToList();
         return kept.Count > 0 ? string.Join(" ", kept) : name.Trim();
     }