Add scrape/ingestion engine + validation, and 24h shift hour-range visualization

Scrape engine (Services/Scraping/): pluggable IListingSource (working sample + Telegram/Divar credential-ready stubs) → IngestionService (content-hash dedupe → parse → validate → review queue) → ListingValidator (completeness score + spam screen) → IngestionWorker (config-gated hosted service). RawListing gains ContentHash/Confidence/ValidationNotes; RawListingStatus.Flagged. Admin /Admin gets run-now, source list, confidence + flagged queue.

Hour-range viz: _HourBar 24h timeline bar (colored by type, overnight wrap) on shift cards, recommendation cards, and detail.

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

src/JobsMedical.Web/appsettings.json

@@ -11,5 +11,11 @@
   },
   "Auth": {
     "AdminPhone": "09120000000"
+  },
+  "Ingestion": {
+    "Enabled": false,
+    "IntervalMinutes": 30,
+    "Telegram": { "Enabled": false, "BotToken": "", "Channels": [] },
+    "Divar": { "Enabled": false, "City": "tehran", "Queries": [] }
   }
 }