Refine unified search answer shaping and viability

src/AdvisoryAI/StellaOps.AdvisoryAI.WebService/Endpoints/UnifiedSearchEndpoints.cs

@@ -647,7 +647,9 @@ public static class UnifiedSearchEndpoints
                 Code = suggestion.Code,
                 CardCount = suggestion.CardCount,
                 LeadingDomain = suggestion.LeadingDomain,
-                Reason = suggestion.Reason
+                Reason = suggestion.Reason,
+                ViabilityState = suggestion.ViabilityState,
+                ScopeReady = suggestion.ScopeReady
             }).ToArray(),
             Coverage = response.Coverage is null
                 ? null
@@ -990,6 +992,10 @@ public sealed record UnifiedSearchSuggestionViabilityApiResult
     public string? LeadingDomain { get; init; }
 
     public string Reason { get; init; } = string.Empty;
+
+    public string ViabilityState { get; init; } = "no_match";
+
+    public bool ScopeReady { get; init; }
 }
 
 public sealed record UnifiedSearchApiCard