Applicants: auto-tags + deep search w/ highlight; never delete (archive instead)

- Tags: parser extracts cert/skill keywords (mmt, ICU/CCU, دیالیز, اتاق عمل,
  اورژانس, مسئول فنی, پروانه‌دار…) + role + city into TalentListing.Tags
  (+ migration); shown as chips on cards.
- Deep search on /Talent: «جستجوی عمیق» box does Postgres ILIKE across
  tags, description, person, area, role, city (every term must match);
  matches are highlighted with <mark> via SearchHighlight.
- Never delete: ShiftStatus.Archived + the admin «بایگانی گروهی» action now
  ARCHIVES aggregated posts (hidden from site, kept in DB) and leaves the
  raw crawl rows intact — a permanent archive for future analytics.

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

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

@@ -205,6 +205,7 @@ public class IngestionService
                     Description = raw.RawText,
                     Status = ShiftStatus.Open, Source = ShiftSource.Aggregated, SourceUrl = raw.SourceUrl,
                     Contacts = BuildContacts(d, parsed),   // fresh instances per listing
+                    Tags = BuildTags(parsed, role, city),
                 });
             raw.Status = RawListingStatus.Normalized;
             return;
@@ -260,6 +261,13 @@ public class IngestionService
         raw.Status = RawListingStatus.Normalized;
     }
 
+    /// <summary>Space-separated searchable tags: parsed cert/skill tags + this listing's role + city.</summary>
+    private static string BuildTags(ParsedListing parsed, Role role, City city)
+    {
+        var tags = new List<string>(parsed.Tags) { role.Name, city.Name };
+        return string.Join(" ", tags.Where(t => !string.IsNullOrWhiteSpace(t)).Distinct());
+    }
+
     /// <summary>Fresh ContactMethod rows for one talent listing (parser contacts + AI phone).</summary>
     private static List<ContactMethod> BuildContacts(AiStructured? d, ParsedListing parsed)
     {