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/Shifts/Details.cshtml

@@ -50,6 +50,10 @@
                 <div class="info-row"><span class="k">مدت</span><span class="v">@JalaliDate.ToPersianDigits(s.DurationHours.ToString("0.#")) ساعت</span></div>
                 <div class="info-row"><span class="k">نقش مورد نیاز</span><span class="v">@(s.Role?.Name ?? s.SpecialtyRequired)</span></div>
                 <div class="info-row"><span class="k">پرداخت</span><span class="v" style="color:var(--primary-dark)">@JalaliDate.PayLabel(s.PayType, s.PayAmount, s.SharePercent)</span></div>
+                <div style="padding-top:12px;">
+                    <span class="k" style="font-size:13px; color:var(--muted);">بازه ساعت کاری در شبانه‌روز</span>
+                    <partial name="_HourBar" model="s" />
+                </div>
             </div>
 
             @if (!string.IsNullOrEmpty(s.Description))