feat: implement multi-tenancy support across knowledge services and normalize TenantId to string type.

src/NexusReader.Web.Client/Services/WasmKnowledgeService.cs

@@ -14,22 +14,22 @@ public class WasmKnowledgeService : IKnowledgeService
         _httpClient = httpClient;
     }
 
-    public async Task<Result<KnowledgePacket>> GetKnowledgeAsync(string text, CancellationToken cancellationToken = default)
+    public async Task<Result<KnowledgePacket>> GetKnowledgeAsync(string text, string tenantId, CancellationToken cancellationToken = default)
     {
         return await CallKnowledgeApiAsync("/api/knowledge", text, cancellationToken);
     }
 
-    public async Task<Result<KnowledgePacket>> GetGraphDataAsync(string text, CancellationToken cancellationToken = default)
+    public async Task<Result<KnowledgePacket>> GetGraphDataAsync(string text, string tenantId, CancellationToken cancellationToken = default)
     {
         return await CallKnowledgeApiAsync("/api/knowledge/graph", text, cancellationToken);
     }
 
-    public async Task<Result<KnowledgePacket>> GetKnowledgeMapAsync(string text, CancellationToken cancellationToken = default)
+    public async Task<Result<KnowledgePacket>> GetKnowledgeMapAsync(string text, string tenantId, CancellationToken cancellationToken = default)
     {
         return await CallKnowledgeApiAsync("/api/knowledge/map", text, cancellationToken);
     }
 
-    public async Task<Result<KnowledgePacket>> GetSummaryAndQuizAsync(string text, CancellationToken cancellationToken = default)
+    public async Task<Result<KnowledgePacket>> GetSummaryAndQuizAsync(string text, string tenantId, CancellationToken cancellationToken = default)
     {
         return await CallKnowledgeApiAsync("/api/knowledge/summary", text, cancellationToken);
     }
@@ -53,6 +53,25 @@ public class WasmKnowledgeService : IKnowledgeService
             return Result.Fail(new Error($"Network error: {ex.Message}").CausedBy(ex));
         }
     }
+    public async Task<Result<GroundednessResult>> VerifyGroundednessAsync(string answer, string context, string tenantId, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            var response = await _httpClient.PostAsJsonAsync("/api/knowledge/verify-groundedness", new { answer, context, tenantId }, cancellationToken);
+            if (response.IsSuccessStatusCode)
+            {
+                var result = await response.Content.ReadFromJsonAsync<GroundednessResult>(cancellationToken: cancellationToken);
+                return result != null ? Result.Ok(result) : Result.Fail("Failed to deserialize groundedness result.");
+            }
+
+            var errorBody = await response.Content.ReadAsStringAsync(cancellationToken);
+            return Result.Fail($"Server error ({response.StatusCode}): {errorBody}");
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail(new Error($"Network error: {ex.Message}").CausedBy(ex));
+        }
+    }
 
     private async Task<Result<KnowledgePacket>> CallKnowledgeApiAsync(string endpoint, string text, CancellationToken cancellationToken)
     {