Strengthen review contracts and HTTP guidance

- add outbound HttpClient transport and HTTP status review rules with paired fixtures`n- resolve layered action-skill overrides deterministically across enabled layers`n- validate findings reports and enforce measurable changed-fixture coverage

microsoft/knowledge/web-services/handle-httpclient-platform-failure-before-response-access.bad.al

@@ -0,0 +1,18 @@
+codeunit 50100 "Http Platform Failure Bad"
+{
+    procedure GetCustomer(CustomerId: Guid): Text
+    var
+        Client: HttpClient;
+        Response: HttpResponseMessage;
+        ResponseText: Text;
+        RequestSucceeded: Boolean;
+    begin
+        RequestSucceeded := Client.Get(
+            StrSubstNo('https://api.example.com/customers/%1', CustomerId),
+            Response);
+
+        // Response content is unavailable when the platform call failed.
+        Response.Content().ReadAs(ResponseText);
+        exit(ResponseText);
+    end;
+}