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/Pages/Shared/_ShiftCard.cshtml

@@ -30,6 +30,7 @@
     }
     <div class="row">📅 @JalaliDate.WeekDayName(Model.Date)، @JalaliDate.ToLongDate(Model.Date)</div>
     <div class="row">🕐 @JalaliDate.Time(Model.StartTime) تا @JalaliDate.Time(Model.EndTime)</div>
+    <partial name="_HourBar" model="Model" />
     <div class="foot">
         <span class="pay">@JalaliDate.PayLabel(Model.PayType, Model.PayAmount, Model.SharePercent)</span>
         <span class="btn btn-outline" style="padding: 6px 14px;">جزئیات</span>