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/Migrations/AppDbContextModelSnapshot.cs

@@ -53,12 +53,43 @@ namespace JobsMedical.Web.Migrations
                         .HasMaxLength(4000)
                         .HasColumnType("character varying(4000)");
 
+                    b.Property<bool>("AutoIngestEnabled")
+                        .HasColumnType("boolean");
+
                     b.Property<int>("AutoPublishMinConfidence")
                         .HasColumnType("integer");
 
+                    b.Property<string>("BaleBotToken")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)");
+
+                    b.Property<bool>("BaleEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("DivarCity")
+                        .HasMaxLength(60)
+                        .HasColumnType("character varying(60)");
+
+                    b.Property<bool>("DivarEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("DivarQueries")
+                        .HasMaxLength(2000)
+                        .HasColumnType("character varying(2000)");
+
+                    b.Property<int>("IngestIntervalMinutes")
+                        .HasColumnType("integer");
+
                     b.Property<int>("Mode")
                         .HasColumnType("integer");
 
+                    b.Property<string>("TelegramChannels")
+                        .HasMaxLength(2000)
+                        .HasColumnType("character varying(2000)");
+
+                    b.Property<bool>("TelegramEnabled")
+                        .HasColumnType("boolean");
+
                     b.Property<DateTime>("UpdatedAt")
                         .HasColumnType("timestamp with time zone");