Facility data hygiene: merge duplicates, drop junk-named facilities

Cleans up the crawl-generated facility table that surfaced garbage on /Facilities
(«بیمارستان هستم», «... از مدجابز», bare «کلینیک», «سازمان برنامه جنوبی» x3):

- FacilityMatcher.IsJunkName: shared detector for non-names — bare type words, cores
  made only of filler/verb tokens, and leaked crawl-source/placeholder text. Added
  داروخانه/آسایشگاه to the generic type words so bare ones are caught and dedupe better.
- HeuristicListingParser.ExtractFacilityName now rejects junk candidates (and emoji), so
  new ingests fall back to the shared placeholder instead of forging a fake facility.
- IngestionService.MergeAndCleanFacilitiesAsync (+ admin button): folds junk facilities
  into the placeholder and merges Persian-fuzzy duplicates into one keeper, repointing
  their shifts/jobs first. Hard guard: only purely crawl-generated, unmanaged facilities
  are removed — employer-owned and verified facilities are never touched.

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

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

@@ -17,7 +17,7 @@ public static class FacilityMatcher
     {
         "بیمارستان", "زایشگاه", "پلی کلینیک", "پلیکلینیک", "درمانگاه", "کلینیک",
         "مرکز درمانی", "مرکز جراحی", "مجتمع پزشکی", "مجتمع درمانی", "مرکز", "مجتمع",
-        "آزمایشگاه", "مطب", "تخصصی", "فوق تخصصی", "فوقتخصصی", "عمومی", "دکتر", "دی کلینیک",
+        "آزمایشگاه", "داروخانه", "آسایشگاه", "مطب", "تخصصی", "فوق تخصصی", "فوقتخصصی", "عمومی", "دکتر", "دی کلینیک",
     };
 
     /// <summary>Lower-cased, Arabic→Persian folded, punctuation-stripped, whitespace-collapsed.</summary>
@@ -47,6 +47,42 @@ public static class FacilityMatcher
         return Regex.Replace(n, @"\s+", " ").Trim();
     }
 
+    // Filler/verb/locator tokens that are never a real facility name — the parser sweeps these in
+    // when an ad has no named facility («بیمارستان هستم», «مطب نیازمندیم سه», «کلینیک های فقط منطقه»).
+    private static readonly string[] JunkCoreWords =
+    {
+        "هستم", "هستیم", "هستش", "میشوم", "میشم", "بشوم", "میباشد", "باشد", "میباشم",
+        "نیازمندیم", "نیازمند", "نیازمندم", "داریم", "دارم", "میخواهیم", "میخوام",
+        "حتی", "تعدادی", "فقط", "منطقه", "واقع", "های", "مبتدی", "محترم", "خوب",
+        "سه", "دو", "یک", "چند", "این", "آن", "همکار", "نیرو",
+    };
+
+    // Crawl-source names that must never appear as a public facility («مرکز درمانی (از مدجابز)»),
+    // plus the shared placeholder text.
+    private static readonly string[] SourceMarkers =
+    {
+        "مدجابز", "مدجاب", "از تلگرام", "از دیوار", "از بله", "از کانال", "ثبت نشده", "نامشخص",
+    };
+
+    /// <summary>
+    /// True when a name is NOT a usable facility name: a bare type word («بیمارستان»), a name whose
+    /// distinctive core is only filler/verb tokens («بیمارستان هستم» → «هستم»), or a leaked crawl
+    /// source / placeholder («... از مدجابز», «نامشخص»). Such an ad has no real named facility and
+    /// should fall back to the shared placeholder instead of forging a fake one.
+    /// </summary>
+    public static bool IsJunkName(string? name)
+    {
+        var normalized = Normalize(name);
+        if (normalized.Length == 0) return true;
+        if (SourceMarkers.Any(m => normalized.Contains(Normalize(m)))) return true;
+
+        var core = Core(name);
+        if (core.Length == 0) return true;   // bare type word only («بیمارستان»، «کلینیک»)
+
+        var tokens = core.Split(' ', StringSplitOptions.RemoveEmptyEntries);
+        return tokens.All(t => t.Length <= 1 || JunkCoreWords.Contains(t));
+    }
+
     /// <summary>True when two names almost certainly denote the same facility.</summary>
     public static bool IsSame(string? a, string? b)
     {