Geocode neighborhood names to an approximate location (no source coords)

Many Medjobs/Telegram ads name a Tehran neighborhood («ونک», «تهرانپارس»…) but
carry no coordinates. New TehranGeo geocoder maps ~45 neighborhood names to a
rough center; Publish falls back to it (from the resolved district / AI district
/ area note) when the source ad has no point. Shown via the existing «محدودهٔ
تقریبی» circle + disclaimer — never a precise pin. Tehran-only; extends the
existing approx-coords feature so non-Divar listings can show a map too.

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

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

@@ -307,6 +307,14 @@ public class IngestionService
                    ?? cities.FirstOrDefault(c => c.IsActive) ?? cities.First();
         var district = districts.FirstOrDefault(x => x.Name == districtName && x.CityId == city.Id);
 
+        // Approx. coords for the map: the source ad's point (Divar) when present; otherwise, for a
+        // Tehran ad that only NAMES a neighborhood (Medjobs/Telegram), geocode that name to a rough
+        // center. Shown as a «محدودهٔ تقریبی» circle, never a precise pin.
+        double? appLat = raw.Lat, appLng = raw.Lng;
+        if (appLat is null && city.Name == "تهران"
+            && TehranGeo.Locate(district?.Name, districtName, parsed.AreaNote) is { } g)
+        { appLat = g.lat; appLng = g.lng; }
+
         var kindStr = (d?.Kind ?? parsed.Kind.ToString()).ToLowerInvariant();
 
         // «آماده به کار» — a worker offering themselves. No facility involved.
@@ -334,7 +342,7 @@ public class IngestionService
                 Phone = !string.IsNullOrWhiteSpace(d?.Phone) ? d!.Phone!.Trim() : parsed.Phone,
                 Description = raw.RawText,
                 Status = ShiftStatus.Open, Source = ShiftSource.Aggregated, SourceUrl = raw.SourceUrl,
-                Lat = raw.Lat, Lng = raw.Lng,   // approx. area from the source ad (Divar)
+                Lat = appLat, Lng = appLng,   // source point (Divar) or geocoded neighborhood center
                 Contacts = BuildContacts(d, parsed),
                 Tags = BuildTags(parsed, d, role, city, extraRoleTags),
             });
@@ -382,7 +390,7 @@ public class IngestionService
                     SalaryMin = parsed.PayAmount,
                     Description = raw.RawText, Status = ShiftStatus.Open, Source = ShiftSource.Aggregated,
                     SourceUrl = raw.SourceUrl,
-                    Lat = raw.Lat, Lng = raw.Lng,   // approx. area from the source ad (Divar)
+                    Lat = appLat, Lng = appLng,   // source point (Divar) or geocoded neighborhood center
                     Contacts = BuildContacts(d, parsed),   // the ad's OWN number(s) — fresh per listing
                 });
         }
@@ -401,7 +409,7 @@ public class IngestionService
                               : parsed.PayAmount is null ? PayType.Negotiable : PayType.PerShift,
                     PayAmount = parsed.PayAmount, SharePercent = parsed.SharePercent,
                     Status = ShiftStatus.Open, Source = ShiftSource.Aggregated, SourceUrl = raw.SourceUrl,
-                    Lat = raw.Lat, Lng = raw.Lng,   // approx. area from the source ad (Divar)
+                    Lat = appLat, Lng = appLng,   // source point (Divar) or geocoded neighborhood center
                     Contacts = BuildContacts(d, parsed),   // the ad's OWN number(s) — fresh per listing
                 });
         }