Changed private web pages and the Confluence search to require a High-confidence provider

app/MindWork AI Studio/Chat/ChatThreadExtensions.cs

@@ -37,20 +37,13 @@ public static class ChatThreadExtensions
         };
 
         //
-        // A provider trusted by the organization's configuration may continue the thread whatever
-        // confidence it requires, the same as the tools which put that data into the thread treat
-        // it as equal to a High-confidence provider. Otherwise such a provider could run a tool
-        // and then be locked out of its own chat by the result.
+        // The confidence axis is checked on its own: a provider trusted by configuration counts as
+        // self-hosted for data-source security, which is the check further down, but that trust
+        // says nothing about how confidential the provider is. An organization which wants its
+        // contractually covered cloud provider to pass here raises its level through the custom
+        // confidence scheme instead.
         //
-        var isTrustedByConfiguration = provider switch
-        {
-            IProvider p => p.IsTrustedByConfiguration(settingsManager),
-            AIStudio.Settings.Provider p => p.IsTrustedByConfiguration(settingsManager),
-
-            _ => false,
-        };
-
-        if (providerConfidence < chatThread.RequiredProviderConfidence && !isTrustedByConfiguration)
+        if (providerConfidence < chatThread.RequiredProviderConfidence)
             return false;
 
         // The chat thread is available, but the data security is not specified.