Move ingestion + Telegram/Bale/Divar config to DB-backed admin settings

- AppSetting gains source config: AutoIngestEnabled, IngestIntervalMinutes, Telegram/Bale/Divar enabled+channels/token/queries
- IListingSource.FetchAsync(AppSetting) — sources read config from DB, not IOptions/appsettings; sample source dev-only
- IngestionWorker reads AutoIngest+interval from DB each cycle (toggle at runtime, no redeploy)
- /Admin/Settings gets a 'منابع جمع‌آوری' section; removed Ingestion env/appsettings + compose env vars
- ENV_FILE shrinks to HOST_PORT + POSTGRES_* + ADMIN_PHONE (AI + sources are all in-admin); migration

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

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

@@ -34,6 +34,16 @@ public class SettingsService
         s.AiSystemPrompt = string.IsNullOrWhiteSpace(incoming.AiSystemPrompt)
             ? AppSetting.DefaultPrompt : incoming.AiSystemPrompt;
         s.AiAutoApprove = incoming.AiAutoApprove;
+        // Channel scraping sources
+        s.AutoIngestEnabled = incoming.AutoIngestEnabled;
+        s.IngestIntervalMinutes = Math.Max(1, incoming.IngestIntervalMinutes);
+        s.TelegramEnabled = incoming.TelegramEnabled;
+        s.TelegramChannels = incoming.TelegramChannels?.Trim();
+        s.BaleEnabled = incoming.BaleEnabled;
+        s.BaleBotToken = incoming.BaleBotToken?.Trim();
+        s.DivarEnabled = incoming.DivarEnabled;
+        s.DivarCity = string.IsNullOrWhiteSpace(incoming.DivarCity) ? "tehran" : incoming.DivarCity.Trim();
+        s.DivarQueries = incoming.DivarQueries?.Trim();
         s.UpdatedAt = DateTime.UtcNow;
         await _db.SaveChangesAsync();
     }