Add contextual fiducial point downloads

Services/CadastralCatalogService.cs

@@ -40,6 +40,14 @@ public sealed class CadastralCatalogService
             .ToArray();
     }
 
+    public async Task<MunicipalityOption?> FindMunicipalityAsync(string municipalityCode)
+    {
+        var code = (municipalityCode ?? string.Empty).Trim();
+        var municipalities = await GetAllMunicipalitiesAsync();
+        return municipalities.FirstOrDefault(item =>
+            string.Equals(item.Code, code, StringComparison.OrdinalIgnoreCase));
+    }
+
     public async Task<IReadOnlyList<string>> GetSheetsAsync(
         MunicipalityOption municipality,
         IProgress<CatalogProgress>? progress = null,